The song "Masterpiece" is by this American singer and songwriter who is  widely cited as an influence by other artists and often referred to as what?
Madonna (entertainer) Madonna Louise Ciccone ( ; born August 16, 1958) is an American singer, songwriter, actress, and businesswoman. A leading presence during the emergence of MTV in the 1980s, Madonna is known for pushing the boundaries of lyrical content in mainstream popular music, as well as visual imagery in music videos and on stage. She has also frequently reinvented both her music and image while maintaining autonomy within the recording industry. Besides sparking controversy, her works have been acclaimed by music critics. Referred to as the "Queen of Pop", Madonna is widely cited as an influence by other artists.
Danny Flowers Daniel W. "Danny" Flowers (born 1948, Henderson, North Carolina) is an American songwriter, recording artist, and guitarist who is best known for his own songs that have been hits for other musicians. These included "Tulsa Time" for Don Williams and Eric Clapton; "Back in My Younger Days" for Don Williams; "Gulf Coast Highway" for Emmylou Harris, Willie Nelson, and Nanci Griffith (co-written with Griffith and James Hooker); and "Before Believing" from Harris' "Pieces of the Sky". Flowers has also enjoyed a solo recording career including the 2007 album, "Tools for the Soul". From that album, "I Was a Burden" was recorded by the Blind Boys of Alabama featuring Lee Ann Womack.