Charli XCX wore red lipstick to Ditch Fridays at the Palms Pool & Dayclub in Las Vegas, NV on June 6, 2014

Charli XCX in Concert at Q102’s Performance Theatre in Bala Cynwyd, PA on October 03, 2014

Kesha at the “Planes: Fire & Rescue” Los Angeles Premiere at El Capitan Theatre in Hollywood, CA on July 15, 2014

Taylor Swift wore black eyeliner and red lipstick at the iHeartRadio Music Festival Las Vegas 2014 at the MGM Grand Garden Arena in Las Vegas, NV on September 19, 2014

Avril Lavigne at her 30th Birthday Celebration at The Bank Nightclub in Las Vegas on September 27, 2014