Singer pops the question in Las Vegas

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Backstreet Boys singer AJ McLean surprised girlfriend Rochelle Karidis by proposing in a crowded club – minutes after buying a ring.

The star got down on one knee at the Wasted Space bar at the Hard Rock Hotel in Las Vegas on Friday.

AJ, 32, decided to pay a visit to a jewellery store moments earlier, and came back with a sparkler.

As the clock struck midnight – marking the start of his birthday – he took to the stage to make his announcement.

Rochelle accepted the proposal.

SEE PICTURES Backstreet Boy AJ McLean proposes to Rochelle Karidis on stage here>>