Justin Timberlake Justin started on "The Mickey Mouse Club" along with Britney and Christina but hit is big with NSYNC'. After "No Strings Attached" the group took a break and Justin went solo. Since singing he has acted, has his own clothing line and is now engaged to Jessica Biel.

Photo By Rabbani and Solimene Photography/Getty Images

Nick Carter He was the young baby face of Backstreet Boys. He tried a solo career in 2011 with "I'm Taking Off", it sold 20,000 copies. He has done reality TV, a few acting gigs but is now back on board with the boys.

Photo By Jakubaszek/Getty Images

Christina Aguilera She was on our radar after "Genie In A Bottle" and shed her good girl images with 2002's "Stripped". Now she is a divorced, single-mom and hosting "The Voice" on NBC.

Photo By NBC/Getty Images

Nick Lachey As the frontman of 98 Degress Nick shot to the top of all of our radars especially Jessica Simpson who he wed and divorced. Now seven years later the 38-year-old is hosting "The Sing-Off" and he and his new wife Vanessa Minnillo are expecting a child.

(credit: Gett

Britney Spears Has gone from pop princess. To having a meltdown. To a mother. Now a bride to be as she prepares Jason Trawick.

Photo By C Flanigan/Getty Images