The 20-year-old arrived at Haze nightclub to perform several of her chart-topping hits as part of the iHeartRadio Kickoff Party.
Cher showed off her tiny frame in the striped crop top, as she posed for photographers and also flashed her growing collection of arm tattoos.
She teamed her top with black jeans and gold wedge trainers, and accessorised with a chunky gold chain and bracelets.
Keeping her look edgy, Cher wrapped a black bandana around her head and tied her brunette locks up into a bun.
Going for bold, smokey eye make-up and long eyelashes, Cher added a splash of colour with a slick of bright pink lipstick.
The 'I Want You Back' singer took time out from her 'I Wish Tour' to perform at the club, and although she was in Vegas to work, we're sure she had time to let her hair down too!
The teen sensation, who has collaborated with American rapper T.I. for her new single 'I Wish', is expected to release her second studio album in November.
Watch the lyric video for 'I Wish' below: