See hilarious old pictures of Mariah Carey, Nicki Minaj, Keith Urban and Randy Jackson
Jennifer Lopez: Now
Serving as a judge on Idol's 10th and 11th season, Lopez -- who's also mom to twins Max and Emme with ex-husband Marc Anthony -- says she'll always remember her roots. "No matter where I wake up...I'm just always right there in the Bronx," the singer, now dating Casper Smart, told Us. "I guess I'm always going to be Jenny From the Block!"