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February 14, 2014 08:15 PM

Christina Aguilera may be having the best Valentine’s Day ever!

The singer and The Voice coach, 33, announced on the most romantic day of the year that she and film producer Matthew Rutler, her beau since the end of 2010, are engaged.

“He asked and I said ,” the recently slimmed down songstress Tweeted on Friday to accompany a shot of her and Rutler holding hands – with a gigantic sparkler on her ring finger.

“They’re very much in love and are really excited to take this next step!” a source close to the pair tells PEOPLE.

Rutler has been a consistent figure in Aguilera’s son Max‘s life – her child from her first marriage to Jordan Bratman.

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