Wow! That's pretty cool! Talk about once in a lifetime.

via eonline.com Can't always get what you want…but Katy Perry sure did at the Rolling Stones concert in Las Vegas Saturday night!

Yep, the 28-year-old pop star hopped on stage with Mick Jagger & Co. for a duet of "Beast of Burden."

Wearing thigh-high boots, a white skirt and a black bustier, Perry looked right at home performing with Jagger, Keith Richards, Charlie Watts and Ronnie Wood. Read more.

Get your tickets when they go on sale THIS FRIDAY!!

via justjared.com The Backstreet Boys are headed out on tour this summer to celebrate twenty years together as a group!

“Backstreet Boys are going on tour this summer,” Nick Carter revealed on theRyan Seacrest radio show. “That’s right, baby! All five of us are back together. It’s our 20th anniversary tour. We’ve got a brand new album coming out.”

The guys – Nick, Kevin Richardson,Brian Littrell, AJ McLean, and Howie Dorough – will be joined by supporting acts Jesse McCartney and Pauly D for the In A World Like This tour.

Keep an eye out for the film! 

via eonline.com Yes, Jennifer Lopez keeps it real. In this instance, that means covering the not-so-glamorous parts of her life (meaning: her and Marc Anthony's divorce) in her upcoming 3-D concert movie, Dance Again.

She explained Wednesday on Elvis Duran and the Morning Show, "I'd been through a big change in my life with the divorce and everything, and as crazy as we are, we thought, 'Let's put that on camera!'" In August, J.Lo's manager, Benny Medina, told Extra his client would be following in Katy Perry and Justin Bieber's footsteps. He explained that the film will cover the past few years in the 43-year-old singer-actress' life.

Child birth isn't easy...even for Shakira!!

via usmagazine.com  Shakira's hips don't lie -- especially after giving birth! The 36-year-old singer appeared on The Ellen DeGeneres Show for a special Mother's Day episode on Friday, May 10, and shared the not-so-pretty details of her son Milan's Jan. 22 birth.

"Delivering a baby is not as idyllic as people make it seem. Don't expect that he is going to be rosy cheeks, cherub when he is born. Actually, when I saw mine, I was like, 'Oh my God,'" Shakira joked to Ellen DeGeneres. "'He is purple and wrinkled. What is this?'" Seeing her own body after baby was a little surprising as well. "Looking at your new image in the mirror . . . I looked like a Shar-Pei when I first delivered," she said. "I was like, 'Oh my God. Am I ever going to be sexy again? Is my man ever going to feel attracted to me again the way he used to be?'"