Two days after Richardson's departure announcement, the Backstreet Boys entered the studio to record their sixth album.
The album, titled Unbreakable, was released on October 30, 2007.
It received positive reviews, and opened at number seven on the Billboard 200, selling 81,000 copies in its first week of release.
It performed well in Japan, debuting at No.
1 on the Japanese Oricon weekly album charts and staying there for another week.
They released two singles from the album, "Inconsolable" and "Helpless When She Smiles".

The group went on a world tour to promote Unbreakable, starting in Tokyo, Japan on February 16, 2008.
The tour included shows in Australia, Japan, Mexico, UK, Europe, Asia, Canada, and the United States.
The show in London's The O2 Arena was filmed and is available to watch online on MSN website.
Richardson rejoined the rest of the group on stage at the Palladium in Hollywood, Los Angeles on November 23, 2008 for the last North American stop of the tour.

On October 6, 2009, the group released their next album, This Is Us.
On this album, their sound went back to their original dance-pop beats and contains a more R&B sound.
The album debuted at No.
9 on the Billboard 200, selling 42,000 copies in its first week of release.
It peaked at No.
2 in Japan and was certified Platinum for shipments of 250,000 copies.
Two singles were released from this album: "Straight Through My Heart" and "Bigger".

A few days after promoting the new album and filming the music video for "Bigger" in Japan, Littrell contracted swine flu, causing the group to cancel a signing at Hard Rock Café in New York for the NYC Pinktober event on October 5, 2009.
The rest of the group were prescribed Tamiflu by a doctor, even though they weren't showing any symptom of the flu.
The group subsequently canceled a scheduled CBS Early Show performance the next day on October 6, 2009, which was also the release day of their new album, This Is Us.
In late October 2009, the group embarked on the This Is Us Tour, which lasted over a year and consisted of 123 shows.

The Backstreet Boys, including Richardson, filmed a segment for The Oprah Winfrey Show on October 22, 2010.
Richardson also performed with the group in the show's studio later that day, making it the second time he had performed with the group since his departure.
Two days after Richardson's departure announcement, the Backstreet Boys entered the studio to record their sixth album. The album, titled Unbreakable, was released on October 30, 2007. It received positive reviews, and opened at number seven on the Billboard 200, selling 81,000 copies in its first week of release. It performed well in Japan, debuting at No. 1 on the Japanese Oricon weekly album charts and staying there for another week. They released two singles from the album, "Inconsolable" and "Helpless When She Smiles".
The group went on a world tour to promote Unbreakable, starting in Tokyo, Japan on February 16, 2008. The tour included shows in Australia, Japan, Mexico, UK, Europe, Asia, Canada, and the United States. The show in London's The O2 Arena was filmed and is available to watch online on MSN website. Richardson rejoined the rest of the group on stage at the Palladium in Hollywood, Los Angeles on November 23, 2008 for the last North American stop of the tour.
On October 6, 2009, the group released their next album, This Is Us. On this album, their sound went back to their original dance-pop beats and contains a more R&B sound. The album debuted at No. 9 on the Billboard 200, selling 42,000 copies in its first week of release. It peaked at No. 2 in Japan and was certified Platinum for shipments of 250,000 copies. Two singles were released from this album: "Straight Through My Heart" and "Bigger".
A few days after promoting the new album and filming the music video for "Bigger" in Japan, Littrell contracted swine flu, causing the group to cancel a signing at Hard Rock Café in New York for the NYC Pinktober event on October 5, 2009. The rest of the group were prescribed Tamiflu by a doctor, even though they weren't showing any symptom of the flu. The group subsequently canceled a scheduled CBS Early Show performance the next day on October 6, 2009, which was also the release day of their new album, This Is Us. In late October 2009, the group embarked on the This Is Us Tour, which lasted over a year and consisted of 123 shows.
The Backstreet Boys, including Richardson, filmed a segment for The Oprah Winfrey Show on October 22, 2010. Richardson also performed with the group in the show's studio later that day, making it the second time he had performed with the group since his departure.
Backstreet Boys