RADIO GIST>>>BEZ IN THE STUDIO WITH TOOLS.

Jennifer Lopez is moving from the judges' panel to the stage. The American Idol judge will show the remaining contestants how to shake their derrière when she performs her controversial song "Dance Again" with boy toy boyfriend Casper Smart on the May 3 episode, Celebuzz has exclusively learned. The music video for the single, a collaboration with rapper Pitbull, debuted to much fanfare on Idol on April 5. Now, 42-year-old J.Lo and Casper, 25, will re-create the smoldering scenes from the sexy video with a live performance that one production source described as going to be "sensational" -- in the same manner as her performance of "On the Floor" during last year’s Idol. "J.Lo’s dancers began learning the choreography for the routine about a week ago and Jennifer joined them for a rehearsal last Saturday (April 21)," a production source told Celebuzz. "There’s another week-and-a-half of intense rehearsals before the performance." There’s no word yet on whether Lopez will pre-tape the "Dance Again" performance and air it as- live, as she did for "On The Floor." One thing is for certain, however: it will be raunchy. The music video features a group of people partaking in what seems to be a masked orgy, a close-up of J.Lo’s famous backside and an elaborately choreographed dance scene between the singer and her beau. As Celebuzz first revealed, Lopez is also preparing to announce her first-ever world tour -- a grueling schedule of more than 60 tour dates, kicking things off in South America, in June.