JLo's 'Las Vegas residency' turns hit!

After months of preparations and anticipations, Jeniffer Lopez kicked off her headlining show Las Vegas residency at Planet Hollywood on January 20.

The 46-year-old singer brought out a few surprise collaborators, which included Ja Rule, Ne-Yo and Pitbull, reports TMZ.com.

The 'Waiting for Tonight' songstress performed for a sold-out, star-studded crowd that included Justin Bieber, Cheryl Burke, Derek Hough, Rosie Huntington-Whiteley, Hoda Kotb, Leah Remini, Gina Rodriguez, Nicole Scherzinger, T.I. Wilmer Valderrama and Rebel Wilson.

Other supporters included her 'American Idol' colleague Ryan Seacrest, her 'Boy Next Door' co-star Ryan Guzman, and her entire 'Shades of Blue' family, including Santino Fontana, Sarah Jeffery, Warren Kole, Ray Liotta, Dayo Okeniyi and Gino Pesi.

JLo had her biggest hits including 'Love Don't Cost a Thing,' 'Jenny From the Block' and 'Get Right' for the audience who grooved-till-death at the show.

It was even reported that the former 'Fly Girl' even sang live instead of using lip sync.