Rihanna has teamed up with NIVEA to offer two lucky fans a trip to the see the singer perform on her 2011 Loud tour and the chance to meet the R&B star in person.

In celebration of its 100th birthday, NIVEA has launched the Skin2Skin Photo Challenge on Facebook in which the grand prize winner of the voting challenge will win a trip for 2 to see the 23-year-old perform in Europe. The winner of the comment challenge will win trips to New York or Las Vegas, VIP tickets and a chance to meet Rihanna.

To enter, fans can upload their "skin2skin" pictures to Facebook. Once the photos are shared, the users with the pics with the highest number of comments and "thumbs ups" will win the two major prizes. In addition, NIVEA will offer daily and weekly prizes, including samples and full sized NIVEA products, coupons and gear.

The contest kicked off on June 23 and will close on Aug. 8 at 6PM PT. Those who need some inspiration can check out submissions here.

The US leg of Rihanna's Loud tour will run through July 24. The Barbados native will then travel through Europe, beginning on Oct. 1 in Ireland.

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