The Dixie Chicks
From Muppet Wiki
The Dixie Chicks are a three-member country music band.
In 2001, they appeared with the Muppets on Family Feud.
In 2002, they appeared on Sesame Street Season 33, performing a remake of "Sing" with chickens. This recording is included on the Songs from the Street CD set. They also made a cameo in a celebrity-filled version of "Sing", which is included in What's the Name of That Song?.
In 2005 they appeared on All Star Alphabet singing a song about the letter B.

