Give me an "S!" Give me an "E!" Give me an "X!" Give me a "Y!" What does that spell? Kacey Musgraves! At least, that's what we're thinking after seeing the 31-year-old singer's [1] sexy Halloween [2] costume. On Oct. 31, the Texas native hit up Kendall Jenner's 24th birthday party [3] sporting a Dallas Cowboys cheerleader costume, and she looked like the ultimate catch. She rocked the classic blue and white ensemble with a cropped tie-front top and vest, white shorts, and knee-high boots. Kacey then tied the look together with a wavy, voluminous hairdo and a pair of pom-poms. "TOUCHDOWWWWN," she captioned a gallery of snaps.

Kacey shared even more moments from Kendall's party on her Instagram story, including pictures with Kourtney Kardashian and Bella and Hadid. She even struck a few playful poses in a photo booth alongside Gigi Hadid, who was dressed as Jim Carrey [4] in The Mask. Look ahead to see more photos of Kacey's cheerful night out!