In Summer 2012, Mendler confirmed that the title of her official debut single was "Ready or Not", written by Mendler herself, Emanuel "Eman" Kiriakou and Evan "Kidd" Bogart.
The song was released for digital download on August 7 and for radio airplay on August 21, 2012. "
Ready or Not" peaked at 49 in the United States and 53 in Australia, but at number seven in the United Kingdom and within the top twenty of the charts in Belgium, the Republic of Ireland and New Zealand.
The song received platinum certification in the United States and Canada and Gold in Denmark, New Zealand and Norway.
Mendler ventured on her first headlining tour, Bridgit Mendler: Live in Concert, supporting her first studio album.
The tour primarily reached only North America and she played at state fairs, music festivals and Jingle Ball's concerts series.
Mendler's debut album, Hello My Name Is..., was released on October 22 by Hollywood Records and all the songs were written by Mendler with collaborators, included 12 tracks in standard version and 15 in deluxe edition.
Mendler was also involved in its production.
The album peaked at number 30 on the Billboard 200 and sold less than 200,000 copies in the country.

Internationally "Hello My Name Is .." debuted in a few countries as Poland, Australia, United Kingdom, France and Spain.
Mendler's vocals have been compared to Lily Allen, Cher Lloyd, Jessie J and Karmin.
She released two promotional singles on the album: "Forgot to Laugh" and "Top of the World".
On February 12, 2013, her second single, "Hurricane", was released for radio airplay.
The song peaked at number 1 on the Billboard Bubbling Under Hot 100 in the United States.
On April 2 Mendler released a remix single version and, on June 21, an EP remixed.
Also in June Mendler debuted her second tour, the Summer Tour, reaching only the United States.
On April 30 she released the extended play Live in London, by Universal Music, recorded at a special performance in the United Kingdom.
It  on Mendler's VEVO On November 16, 2013 was premiered the music video for acoustic version of "Top of the World", directed by Matt Wyatt.
 She recorded it on her own, independent of Hollywood Records, and filmed in Griffith Park, in Los Angeles.

On June 28, 2014, Mendler began the second leg of her Summer Tour, in Charlottetown, Prince Edward Island, Canada.
On that date, she sang one of her new songs, "Fly to You", about a relationship that was said to be on the rocks but worth fighting for.
On July 5, she performed another new song, "Deeper Shade Of Us", with disco influences.
On November 25, 2014, Mendler was announced as a member of the main cast of the NBC comedy series Undateable in season two.
She portrays the character Candace, an unlucky and undefeatably optimistic waitress, who becomes part of the main group.
During the season, Candace and Justin, played by Brent Morin, were dating.
After initial reports, it was confirmed on July 2, 2015, that Mendler left Hollywood Records earlier in the year.

In early 2015, NBC renewed with Mendler for a third season that consisted entirely of live episodes, which premiered October 15 of that year.
In the season Justin proposes to Candace during a Backstreet Boys show and she accepts.
On November 13, 2015, minutes before air time, a decision was made to pre-empt the then-upcoming live program due to the November 2015 Paris attacks.
The next week, the live episode references were made about the attack as a tribute.
Following the third season, it was announced that NBC had cancelled continuation of the series.
In Summer 2012, Mendler confirmed that the title of her official debut single was "Ready or Not", written by Mendler herself, Emanuel "Eman" Kiriakou and Evan "Kidd" Bogart. The song was released for digital download on August 7 and for radio airplay on August 21, 2012. "Ready or Not" peaked at 49 in the United States and 53 in Australia, but at number seven in the United Kingdom and within the top twenty of the charts in Belgium, the Republic of Ireland and New Zealand. The song received platinum certification in the United States and Canada and Gold in Denmark, New Zealand and Norway. Mendler ventured on her first headlining tour, Bridgit Mendler: Live in Concert, supporting her first studio album. The tour primarily reached only North America and she played at state fairs, music festivals and Jingle Ball's concerts series. Mendler's debut album, Hello My Name Is..., was released on October 22 by Hollywood Records and all the songs were written by Mendler with collaborators, included 12 tracks in standard version and 15 in deluxe edition. Mendler was also involved in its production. The album peaked at number 30 on the Billboard 200 and sold less than 200,000 copies in the country.
Internationally "Hello My Name Is .." debuted in a few countries as Poland, Australia, United Kingdom, France and Spain. Mendler's vocals have been compared to Lily Allen, Cher Lloyd, Jessie J and Karmin. She released two promotional singles on the album: "Forgot to Laugh" and "Top of the World". On February 12, 2013, her second single, "Hurricane", was released for radio airplay. The song peaked at number 1 on the Billboard Bubbling Under Hot 100 in the United States. On April 2 Mendler released a remix single version and, on June 21, an EP remixed. Also in June Mendler debuted her second tour, the Summer Tour, reaching only the United States. On April 30 she released the extended play Live in London, by Universal Music, recorded at a special performance in the United Kingdom. It  on Mendler's VEVO On November 16, 2013 was premiered the music video for acoustic version of "Top of the World", directed by Matt Wyatt.  She recorded it on her own, independent of Hollywood Records, and filmed in Griffith Park, in Los Angeles.
On June 28, 2014, Mendler began the second leg of her Summer Tour, in Charlottetown, Prince Edward Island, Canada. On that date, she sang one of her new songs, "Fly to You", about a relationship that was said to be on the rocks but worth fighting for. On July 5, she performed another new song, "Deeper Shade Of Us", with disco influences. On November 25, 2014, Mendler was announced as a member of the main cast of the NBC comedy series Undateable in season two. She portrays the character Candace, an unlucky and undefeatably optimistic waitress, who becomes part of the main group. During the season, Candace and Justin, played by Brent Morin, were dating. After initial reports, it was confirmed on July 2, 2015, that Mendler left Hollywood Records earlier in the year.
In early 2015, NBC renewed with Mendler for a third season that consisted entirely of live episodes, which premiered October 15 of that year. In the season Justin proposes to Candace during a Backstreet Boys show and she accepts. On November 13, 2015, minutes before air time, a decision was made to pre-empt the then-upcoming live program due to the November 2015 Paris attacks. The next week, the live episode references were made about the attack as a tribute. Following the third season, it was announced that NBC had cancelled continuation of the series.
Bridgit Mendler