Looks like Carrie Underwood and Mike Fisher‘s upcoming nuptials are right around the corner, as Mike just celebrated his bachelor party this weekend in Miami! While the groom-to-be was on his best behavior, some of his friends got a little out of hand at Mike’s impromptu soiree, a source tells OK! exclusively.

“No one knew he was coming; it was arranged through a friend,” a partygoer tells OK! of Mike’s bachelor party.

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About 20 guys were in attendance to celebrate Mike’s final weeks of singledom at Mansion in Miami.

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Lil Jon was deejaying and those guys were crazy!” the onlooker adds. “With the exception of Mike. He was pretty subdued laughing at his friends, and only had a drink or two.”

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Meanwhile his friends were getting rowdy at the bar.

“Mike was definitely on good behavior and his friends told the waitress that the wedding is ‘very soon.’ ”

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