FILE - In this Oct. 11, 2012 file photo, Jennifer Hudson performs 

FILE - In this Oct. 11, 2012 file photo, Jennifer Hudson performs onstage at "We Will Always Love You: A Grammy Salute to Whitney Houston," at Nokia Theatre in Los Angeles. The Rock and Roll Hall of Fame and Museum announced Wednesday, Jan. 23, 2013, that Hudson, Christina Aguilera and John Mayer are among the stars set to perform at the 28th annual Rock and Roll Hall of Fame induction ceremony to be held on April 18, 2013, in Los Angeles. (Photo by Chris Pizzello/Invision/AP, File)
Associated Press
FILE - In this Oct. 11, 2012 file photo, Jennifer Hudson performs onstage at "We Will Always Love You: A Grammy Salute to Whitney Houston," at Nokia Theatre in Los Angeles. The Rock and Roll Hall of Fame and Museum announced Wednesday, Jan. 23, 2013, that Hudson, Christina Aguilera and John Mayer are among the stars set to perform at the 28th annual Rock and Roll Hall of Fame induction ceremony to be held on April 18, 2013, in Los Angeles. (Photo by Chris Pizzello/Invision/AP, File)
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