Kimberly Perry took a break from hosting ABC's 'CMA Music Festival: Country's Night to Rock' to join brothers Neil and Reid onstage as the Band Perry shocked the LP Field audience with a spirited version of 'Fat Bottomed Girls' by the classic rock band Queen. Neil Perry sang lead after Kimberly took the crowd through their hit 'Postcard From Paris.' 

The Perry sister did begin the cover, singing "Fat bottomed girls / You make the rockin' world go round" with a wide grin before turning the lead vocals to her younger brother, who usually serves as backing vocalist and mandolin player in the sibling trio. On this song, he tore through both verses while Reid and Kimberly supported him.

At the very end, Kimberly took over, shouting out "Fat bottomed girls / We make the rockin' world go round," much to the delight of the crowd. Of course few would put her in the fat-bottomed category, and she looked beautiful during this performance, wearing a short, shimmery summer dress. Neil wore his usual vest over a pair of blue jeans, while the eccentric Reid looked straight out of 1972 in a colorful, flowing shirt.

It was an extended clip for the Band Perry, as before their two-song set for television viewers they shared a day in the life of a band at the CMA Music Festival. The trio showed what it was like behind the scenes of their first-ever fan club party, signing at the convention center and during soundcheck. By the end of the commercial break, Kimberly Perry had returned to her hosting duties.

Watch the Band Perry Perform 'Fat Bottomed Girls' at the 2012 CMA Music Festival