Jennifer Lopez yet again dresses up in a gorgeously sexy dress for American Idol. The 45-year-old actress and singer was the first celebrity star to wear an extremely plunging neckline dress in 2000 Grammys in a green Versace gown. The singer does not seem to give up on that look. She wore a very low cut plunging neckline dress, black background with several colorful shimmery. The pattern was similar to a rainbow, and it had a more retro look to it. The gown was long and was all the way touching the ground. Ex-wife to singer Marc Anthony, Jennifer Lopez sizzled in highlighted locks pulled back into a tight ponytail. She also added large diamond hoops to the ensemble and drew attention. As for the make-up, she chose burgundy tones like deep red lipstick and eye shadow for the night. Her black heels were six inches which could hardly be seen as her gown covered it all.