Jennifer Lopez and TLC also added to the awards show bill
Show's 13th season will include Harry Connick, Jr.
Rights group says rapper's visit legitimized a 'human rights wasteland'
Rapper entertained at the wedding of president's grandson
Fox still has a vacancy to fill after last season's departures
J. Lo marks latest surprise guest duet on Red tour
Fashion fixes from Madonna, Lil Wayne and more
'Hey Ya,' 'Seven Nation Army,' 'In Da Club' and more from 2003
'Had there been knowledge of human-right issues of any kind,' singer wouldn't have gone
President Gurbanguly Berdimuhamedow accused of human rights violations
Rita Ora, Florence and the Machine, Madonna and more hit the stage for London benefit concert
Only remaining original judge will depart after 12 seasons
Beyonce, Madonna, Taylor Swift and Kanye West were among the attendees
Jennifer Garner, Meryl Streep, Jennifer Lopez also set for awards show
Artists react with joy as president wins a second term in office