What do the sultry, Grammy Award-winning Colombian superstar Shakira and Out of the Blue, a University of Oxford all-male a capella group, have in common? Their hips don't lie, they both believe in charity, and both of their videos have become huge successes on YouTube.

The young British crooners recently went viral on YouTube for their colorful a capella rendition of "Hips Don't Lie," "Whenever, Wherever" and "Waka Waka (This Time for Africa)." Let's just say Shakira makes these clever chaps want to speak Spanish!

Not only do the lovable Brits dressed in University of Oxford uniforms have the vocal chops, but the cheeky fellas channel the Colombian songstress by taking their shirts off (one member's back is encrusted in rhinestones) and they shake their hips and bums with such vigor that they even grabbed Shakira's attention online.

"The Oxford choir - Out Of The Blue is awesome! And the fact that they are doing this for charity makes it all the more special...soo well done!! Shak," Shakira wrote on Facebook.

According to Out of the Blue, the proceeds from the sale of its Shakira a cappella spin-off will benefit the Helen & Douglas House Hospice for Children and Young Adults, a hospice charity based in Oxford, U.K. that provides free palliative, respite, end-of-life, and bereavement care for children and young adults, and their families.

In 2011, Out of the Blue showed off its impressive vocal harmonies, pizzazz and snazzy moves when the group appeared on "Britain's Got Talent," where they put their spin on Justin Timberlake's "SexyBack" and Lady Gaga's "Poker Face." They wowed the judges and the audience so much that they made it to the semifinals.

Out of the Blue members are reportedly huge fans of Zumba and belly dancing, so there was no trepidation when it came to shaking what their momma gave them.

"We couldn't believe we were tweeted by Shakira. On the Facebook post she signed it off personally so we knew she had actually watched the video, which is amazing," said Joshua Barr, an English student and baritone who has been president of the group since 2012, according to The Guardian. "We've recorded the song for charity and all the proceeds go to the hospice Helen and Douglas House, so the most exposure it gets, the better."

Given Shakira's "global appeal," the a capella group thought her songs would resonate across the board. It also gives their fans another taste of their good-humor and talent -- and for some of them who have already graduated, a chance to relive the joy of singing a capella in a collegiate setting.

"We love her songs and we thought they would appeal to everyone," Barr added. "As is probably evident from the video, we are not afraid to make ourselves look silly. A group of guys shaking their hips and wiggling their bums to Shakira is not what most people expect to see, which I think is why it's so popular."

America has had an ongoing love affair with a capella and doo-wop, which began in the 1940s in New York, Chicago and Philadelphia, then became more mainstream in the 1960s and 1970s. Today, TV audiences have reaffirmed their affection for the genre through TV hits such as FOX's "Glee" and NBC's "The Sing Off," where a capella groups from around the country battle it out on a grander stage.

If you have ever witnessed an a capella show live then you know firsthand the intricacies and intertwining of rhythms, beats and vocal percussion and especially the effortless cool that is needed to pull off a stellar performance.

Once an a capella groupie myself, having grown up watching a capella groups sing at Harvard Square in Boston as a kid to attending the University of Massachusetts, Amherst, home to some of the greatest collegiate a capella groups on the East Coast, I can attest to the awesomeness of Out of the Blue, and being half-Colombian and a fan of Shakira, I give their Shakira medley a huge thumbs up -- and a shake of the hips of course!