While Amber has been promoting her first solo single “Shake That Brass”, her fellow f(x) member Luna has frequently joined her on stage for performances. Luna steps in for SNSD‘s Taeyeon who featured on the recording of the track. During a recent appearance on M Countdown, the duo could be seen wearing matching ensembles made up of items from the JOYRICH x FILA collaboration collection. The Spring/Summer 2015 line features sportswear with the FILA logo and zebra print accents. Luna wore a Black Logo Tee ($48) with a white tennis skirt. Amber wore the white version of the Logo Tee ($48) with a polyester tracksuit consisting of the white JOYRICH x FILA Windbreaker Jacket ($220) and white Logo Track Pants ($128).