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Nick Carter, Instagram

Instagram

Nick Carter has shown his girlfriend the shape of his heart.  

The Backstreet Boy is engaged to 29-year-old fitness expert Lauren Kitt after popping the question on a small island in the Florida Keys, People magazine reports.

Carter hinted at the proposal on his Instagram account today, posting a photo with his gal and the cryptic caption, "Big question…great answer." 

Nick Carter, Twit Pic

Instagram

The 33-year-old boy-bander and his fiancée have been dating for four years and he reportedly proposed with a 7-carat diamond ring (nice work, Nick!).

Carter's wife-to-be also posted a photo of the couple's serene location, snapping a shot of the small island where the engagement seemingly went down.

"A little island all to ourselves! #KeysLife," she captioned the pic two days before Nick asked her to marry him.

Based on their smiling faces, the couple is clearly overjoyed to be taking the next step in their relationship.

Congrats, you two! We wish you many more years of happiness.