This week "American Idol" said goodbye to Hollie Cavanagh — and a big hello to judge Jennifer Lopez, who dominated the show with a killer live performance, another gorgeous dress and a visit from her adorable twins, Max and Emme.
To kick off the show, the 42-year-old J-Lo arrived in a ’60s-inspired beaded white halter dress that — yep, you guessed it — showed off her legs.