AceShowbiz - Sabrina Carpenter had a special guest during her set at Outside Lands. On Saturday, August 10, the "Espresso" hitmaker delighted fans by bringing out Texas singer Kacey Musgraves.

The 25-year-old first kicked off her performance by delivering a few flirty songs from her 2022 album "Emails I Can't Send". Rocking a black glittery leotard, fishnet stockings and platform heels, the "Tall Girl" star disappeared from the stage while her backup performers engaged in a mini dance-off.

Sabrina later showed up in a sparkling blue dress and shiny knee-high boots. She later introduced her pal as the screens at both ends of the stage displayed the words, "Special guest Kacey Musgraves". The country singer herself donned a light blue strapless dress and heels.

Sabrina started playing the tambourine as the two performed a rendition of Nancy Sinatra's "These Boots Are Made For Walkin' ". The two musicians took turns belting out lines from the '60s hit.

During her set, Sabrina also entertained fans with a performance of "Please Please Please", the second single from her forthcoming album, "Short n' Sweet". Afterward, the singer/actress delivered the unreleased song "Slim Pickins", which she debuted in an intimate performance at the Grammy Museum alongside producer Jack Antonoff.

Sabrina was among the stars who performed at the San Francisco music festival. Other artists included Post Malone, Shaboozey, The Killers, Chappell Roan as well as Sturgill Simpson.

Sabrina, who has been in a romantic relationship with Irish actor Barry Keoghan, has been keeping herself busy. Recently, she attended Variety's 2024 Power of Young Hollywood bash in Santa Monica.