Tommy's ex shows up she's getting married, and she wants Mother of the Bride ...
Wedding Band
Season 1 Episode 9: Personal Universe
While playing Oktoberfest, Mother of the Bride is approached by a fan, rock star Declan Horn. Declan wants to hang out with them, but in a lesson of "never meet your idol," the band has to contain Declan after he lets his inner-rock animal out at their next event: a Sweet 16 party.