Mariah Carey

Singer and actress Mariah Carey makes a guest appearance at a shopping center, where she turned on the Christmas lights with the help of eight children from the charity 'Help A London Child' in London on November 19, 2009.  (AP/Joel Ryan)

Singer and actress Mariah Carey makes a guest appearance at a shopping center, where she turned on the Christmas lights with the help of eight children from the charity 'Help A London Child' in London on November 19, 2009. (AP/Joel Ryan)

Singer and actress Mariah Carey makes a guest appearance at a shopping center, where she turned on the Christmas lights with the help of eight children from the charity 'Help A London Child' in London on November 19, 2009.  (AP/Joel Ryan)

Singer and actress Mariah Carey makes a guest appearance at a shopping center, where she turned on the Christmas lights with the help of eight children from the charity 'Help A London Child' in London on November 19, 2009.  (AP/Joel Ryan)

Mariah Carey landed more than just a big pay cheque for a private gig in Turkey when she was showered with diamond gifts. She was paid a staggering $1.5 million for a one-off performance at the launch of the Mardan Palace. Mariah was gifted millions more in sparkling jewels, including a huge five-carat diamond ring in the shape of her signature butterfly. (REUTERS/Eric Gaillard)

US actress and singer Mariah Carey arrive prior the screening of the movie 'Bak-Jwi' in competition at the 62nd Cannes Film Festival. (AFP/Anne-Christine Poujoulat)

Cast member Mariah Carey poses on the red carpet as she arrives for the screening of the film 'Precious' at the 62nd Cannes Film Festival. (REUTERS/Eric Gaillard)

Pop singer Mariah Carey will sing "Hero" for Barack Obama when he is sworn in as the 44th American president. She says: "It’s fitting for him. It’s appropriate." She admits she's "nervous" about her performance, and is glad to be American. (AFP/Stan Honda)

American pop star Mariah Carey poses for photographs during a photo session after her press conference in Shanghai. (AFP Photo/Liu Jin)

After winning accolades for her role in 'Tennessee', Mariah Carey is set to act in an upcoming flick 'Push'. She will be seen portraying a social worker ministering to an obese, HIV-positive woman impregnated twice by her father, reports the 'New York Daily News'. (Reuters/Pascal Deschamps)

Pop superstar Mariah Carey swims with an obliging pink dolphin at Singapore's Underwater World theme park 12 March 2000 during her brief visit to the island nation for a concert. (AFP Photo)

Singer Mariah Carey (L) performs with Jay-Z in New York. (Reuters/Brendan Mcdermid)

US pop music diva Mariah Carey performs in the Lebanese capital Beirut. (AFP/Ramzi Haidar)

American singer Mariah Carey arrives for the Swarovski Fashion Rocks for The Prince's Trust in Monte Carlo. (Reuters/Eric Gaillard)

Singer Mariah Carey poses during the 2005 Recording Academy Honors at Gotham Hall in New York City. (Reuters/Peter Foley)

US singer Mariah Carey (C) performs during the International Carthage festival at the El-Manzeh olympic stadium in Tunis. (AFP/Fethi Belaid)

Mariah Carey is set to celebrate her wedding to rapper Nick Cannon after a whirlwind romance with a huge party. They have hired the Stone Meadow Farm in New York for a week, at a cost of $125,000, before they host the star-studded party. (Photo/Patrick Hertzog)

Mariah Carey takes part in German TV show "Wetten Dass..." (Let's make a bet...) in Berlin. (AFP Photo/Soeren Stache)

US singer Mariah Carey arrives at the opening of a multi-million dollar school on January 2, 2007. (AFP Photo/Stringer)

Mariah Carey performs at the ABC Good Morning America Summer Concert series at Times Square in New York. (Reuters/Mike Segar)

Mariah Carey arrives at the 10th anniversary Gala of the VH1 'Save the Music Foundation' in New York. (Reuters/Lucas Jackson)

Mariah Carey performs at the 'Idol Gives Back' show at the Kodak theatre in Hollywood. (Reuters/Mario Anzuoni)

Mariah Carey throws the first ball of Japan's baseball match between Yomiuri Giants and Rakuten Eagles in Tokyo. (Reuters/Kim Kyung Hoon)

Mariah Carey performsm while holding the trophy at the MTV Video Music Awards '08 in Saitama. (Reuters/Kim Kyung Hoon)

Mariah Carey attends an unveiling ceremony of a chair named 'Mariah' in Tokyo. (Reuters/Kim Kyung Hoon)

US singer Mariah Carey launches her debut fragrance 'M by Mariah Carey' at Macy's department store in New York (AFP Photo/Emmanuel Dunand)

Singer Mariah Carey poses with a replica of her legs at Radio City Music Hall in New York. (Photo/ Reuters Shannon Stapleton)

Singer Mariah Carey launches her new fragrance 'M by Mariah Carey' at Macy's Herald Square, Tuesday, October 23, 2007 in New York. (AP Photo/Evan Agostini)

Singer Mariah Carey makes a guest appearance on the BET show '106 and Park' Monday, October 22, 2007 in New York. (AP Photo/Gary He)

Singer Mariah Carey arrives at VH1 Save the Music Foundation 10th Anniversary gala in New York (AP Photo/Peter Kramer, file)

U.S. singer Mariah Carey performs during the 57th Bambi media awards in Munich (Reuters/ Alexandra Winkler)

Singer Mariah Carey performs in New York August 23, 2006. (Photo/Reuters Brendan McDermid)

Mariah Carey arrives to attend the 10th anniversary gala of the VH1 "Save the Music Foundation" in New York onSeptember 20, 2007. (Photo/ Reuters Lucas Jackson)

Mariah Carey reacts to being nominated for eight Grammy awards in New York December 8, 2005. Carey's "The Emancipation of Mimi" was nominated for best album of the year while her ballad "We Belong Together" was nominated for song of the year. (Photo/Reuters Chip East)

Singer Mariah Carey arrives at the opening of the Oprah Winfrey Leadership Academy for Girls outside Johannesburg January 2, 2007. Winfrey started the private learning and residential institution for girls in grades 7-12 who show outstanding promise despite their social circumstances. (Photo/ Reuters Siphiwe Sibeko)