"FILE - In this photo provided by NBC Lady Gaga performs during the season five finale of ""The Voice"" on Tuesday, Dec. 17, 2013, in Los Angeles. NBC announced Monday, Feb. 10, 2014, that Will Smith will appear on the Feb. 17 debut of ""The Tonight Show Starring Jimmy Fallon."" U2 will perform. Justin Timberlake will close out the week, which will also include appearances from Michelle Obama, Will Ferrell, Bradley Cooper, Kristen Wiig and Jerry Seinfeld. Lady Gaga, Arcade Fire and Tim McGraw will also perform during the week. (AP Photo/NBC, Trae Patton)"
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