Selena Gomez had plenty to celebrate on Friday night after kicking off her Revival Tour in Las Vegas.

After a busy night of dancing and belting out her hits, the 23-year-old headed to an after party at Light Nightclub at Mandalay Bay Hotel and Casino.

Selena looked stunning for the red carpet event in a slinky silver gown, which clung to her incredible figure and allowed her to show some skin.

The pop star went bra-less and flashed her cleavage thanks to a plunging neckline, while a thigh-high slit left her slender legs on show.

Selena teamed the daring dress with a pair of fluffy heels, and decided to forgo any other accessories.

The singer and actress wore her long brunette locks in waves and finished off her look with lashings of smoky eye make-up, false lashes and red lipstick.

According to People, her close pal Orlando Bloom joined her at the VIP table for some drinks and was seen kissing her on the cheek, but a source says the pair are ‘absolutely just friends’.

See Selena Gomez updates as she turns heads on opening night of her Revival Tour

Selena had performed at the Mandalay Bay Events Center earlier in the evening, while wearing an array of glitzy and revealing stage ensembles.

The former Disney star’s set list included recent hits Same Old Love and Good For You, as well as some of her older songs such as Come &Get It and Love You Like A Love Song.

Selena, who had DNCE and Bea Miller as her opening acts, admitted in a recent interview that she couldn’t wait for the start of her tour.

‘I haven’t toured for two years, and there’s such a difference when you perform music that you created,’ she told Entertainment Weekly.

Selena added: ‘Singing songs that represent everything I am is just the best feeling in the world.’

The world tour will see the hit-maker perform in the United States and Canada before travelling to Asia in July.

Selena will then be performing throughout Europe in October and November, concluding her tour in Mexico on December 18.

The beauty’s representatives revealed to The Hollywood Reporter earlier this week that she is planning to donate money from ticket sales to Alliance for Lupus Research.

Selena previously had to cancel her Stars Dance tour in 2013 in order to undergo chemotherapy treatment for the chronic inflammatory disease.