Question: Which American singer was part of the Citizen Change political service group and spent a record sixteen weeks atop the "Billboard" Hot 100.

<P0-S0> "How Deep Is Your Love" is a pop ballad written and recorded by the Bee Gees in 1977 and released as a single in September. <P0-S1>  It was ultimately used as part of the soundtrack to the film "Saturday Night Fever". <P0-S2>  It was a number three hit in the United Kingdom and Australia. <P0-S3>  In the United States, it topped the "Billboard" Hot 100 on 24 December 1977 (becoming the first of six consecutive US number-one hits), ended the 10-week reign of Debby Boone's "You Light Up My Life" and stayed in the Top 10 for a then-record 17 weeks. <P0-S4>  The single spent six weeks atop the US adult contemporary chart. <P0-S5>  It is listed at number 22 on the 55th anniversary edition of "Billboard's All Time Top 100". <P0-S6>  Alongside "Stayin' Alive" and "Night Fever", it is one of the group's three tracks on the list. <P0-S7>  The song was covered by Take That for their 1996 "Greatest Hits" album, reaching number-one on the UK Singles Chart for three weeks. <SEP> <P1-S0> Citizen Change is a political service group, founded by musician P. Diddy, and backed by Mary J. Blige, Mariah Carey and 50 Cent. <P1-S1>  The stated aim was to get young people to vote. <SEP> <P2-S0> Mariah Carey (born March 27, 1969 or 1970) is an American singer, songwriter, record producer, and actress. <P2-S1>  In 1990, she rose to fame with the release of "Vision of Love" from her eponymous debut album. <P2-S2>  The album produced four chart-topping singles in the US and began what would become a string of commercially successful albums which solidified the singer as Columbia Records' highest selling act. <P2-S3>  Carey and Boyz II Men spent a record sixteen weeks atop the "Billboard" Hot 100 in 1995–1996 with "One Sweet Day," which remains the longest-running number-one song in US chart history. <P2-S4>  Following a contentious divorce from Sony Music head Tommy Mottola, Carey adopted a new image and traversed towards hip hop with the release of "Butterfly" (1997). <P2-S5>  In 1998, she was honored as the world's best-selling recording artist of the 1990s at the World Music Awards and subsequently named the best-selling female artist of the millennium in 2000. <SEP> <P3-S0> American-Canadian singer Robin Thicke has released seven studio albums, twenty-six singles and twenty music videos. <P3-S1>  Thicke signed his first recording contract with Interscope Records as a teenager and found success as a songwriter, before he began concentrating on his career as a performer. <P3-S2>  In 2000, Thicke started recording his debut album, "A Beautiful World", which was released in April 2003. <P3-S3>  The album debuted at number 152 on the US "Billboard" 200, selling 119,000 copies. <P3-S4>  The record also peaked at number 36 on the Mega Album Top 100 in the Netherlands. <P3-S5>  Two singles were released from the album; the first, "When I Get You Alone" became a top ten hit in the Netherlands and New Zealand. <P3-S6>  That single also peaked at number 17 in Australia and was certified gold by the Australian Recording Industry Association (ARIA). <P3-S7>  In 2006, Thicke released his second studio album "The Evolution of Robin Thicke". <P3-S8>  The record debuted at number 5 on the US "Billboard" 200, topped it on the "Billboard"'s Top R&B/Hip-Hop Albums, and became a certified platinum by the Recording Industry Association of America (RIAA). <P3-S9>  The album also charted in France, the Netherlands, and the United Kingdom. <P3-S10>  "The Evolution of Robin Thicke" produced four singles, all of which charted on the "Billboard"'s Hot R&B/Hip-Hop Songs. " <P3-S11> Lost Without U" became one of his biggest hits, peaking at number 14 on the US "Billboard" Hot 100 and spending 11 weeks atop the "Billboard"'s Hot R&B/Hip-Hop Songs.