Though Blake Shelton and Adam Levine claim to have the show’s biggest “bromance” on The Voice, Christina Aguilera frequently admits that Blake is one of her best friends and token “brother.”

So in this happy, musically-inclined family, who is the older sibling?

You might be surprised to learn that though Xtina’s been in the music industry much longer, Blake is exactly four years and six months older than the pop diva.

Blake was born on June 18, 1976 and is currently 36, and Christina Aguilera will celebrate her 32nd birthday on this season’s finale of The Voice on Dec. 18.

Are you surprised that Blake is older than Christina? Weigh in below!

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