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Look who it is! Watch as Mark Wahlberg reunites with New Kids on the Block

On Monday, Mark Wahlberg joined the New Kids on the Block (and his brother Donnie) onstage at Madison Square Garden.
/ Source: TODAY

Before he was the less-fuzzy half of "Ted 2," before he had two Oscar nominations and an A-list Hollywood career, Mark Wahlberg was a pumped-up rapper with a 1991 No. 1 hit: "Good Vibrations."

He was also, for a few months, a member of New Kids on the Block with his brother, Donnie.

MORE: Why didn't Mark Wahlberg's wife want him to make 'Ted'?

So in theory it should have been tons of fun for everyone on Monday night when, for the first time in 20 years, Mark appeared on stage with all the members of NKOTB at Madison Square Garden (along with fellow surprise guest 50 Cent) in an appearance that had the crowd cheering.

Wahlberg embraced and shook hands with everyone on the stage and checked out the crowd; after just a few minutes, he walked off side-by-side with 50 Cent.

The opening riffs of "Good Vibrations" played for a little while, as if the plan had been for him to reprise his hit, but no such luck.

Regardless, Donnie was clearly proud, posting an Instagram of the brothers embracing with the caption, "Marky Mark retired 25 years ago, but I still loved sharing the stage w my brother @mark_wahlberg tonight!"

Who says New York can't also be the city of brotherly love?

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