She was set to attended the 2013 Billboard Music Awards on Sunday night, along with her on and off again boyfriend Justin Bieber

So Selena Gomez made sure she was dressed to impress as she hit the red carpet at the MGM Grand Hotel in Las Vegas, Nevada for the main event.

The 20-year-old pop star flashed plenty of flesh in a revealing white futuristic-style gown, which was slashed to the thigh and featured multi-coloured neon trim.

Out of this world: Selena Gomez flashed plenty of flesh in a white futuristic-style gown, which was slashed to the thigh at the 2013 Billboard Music Awards in Las Vegas on Sunday night

The dress in question displayed Selena’s very slim and toned figure and the pink, green and yellow accents around the neck and arms made it fashion forward.

However, as Selena turned around, the gown failed to flatter her figure, with it’s ill fit at the back and odd sheer nude panelling.

The Come & Get It star paired the attire with some silver strappy heels and wore no other accessories, bar some stud earrings and a ring on her finger.

Daring: The dress in question displayed Selena’s very slim and toned figure and the pink, green and yellow accents around the neck and arms made it fashion forward

Letting her dress do all the talking: The Come & Get It star paired the attire with some silver strappy heels and wore no other accessories, bar some stud earrings and a ring on her finger

She accentuated the pink in the trim further by wearing lashings of pink lipstick on her pout and had heavy black wing tipped eyeliner around her eyes.

She had also straightened her hair, pulling it back into a messy ponytail, but despite it being a sleek style, her tresses at the back appeared matted and frizzy.

Selena was set to be sitting next to Bieber at the Billboard Awards on Sunday night.

Waving to her fans: Selena beamed as she waved to her adoring fans whilst posing on the blue carpet

Messed up: Selena straightened her hair, pulling it back into a messy ponytail, but despite it being a sleek style her tresses at the back appeared matted and frizzy

Heavily made-up: She accentuated the pink in the trim further by wearing lashings of pink lipstick on her pout and had heavy black wing tipped eyeliner around her eyes

The Baby hitmaker and the gorgeous brunette singer had appeared to had patched things up since their split in the New Year and were expected to go public at the annual music awards in Las Vegas on Sunday night.

According to Us Weekly, a source revealed Selena, 20, would be sitting on the front row at the MGM Grand Garden Arena right next to Justin, with her close friend Taylor Swift on her other side.

The insider said it was ‘clearly no accident’, adding, ‘Their camps must have requested this seating arrangement. No way would it have happened without their go-ahead.’

Happy snap: Selena posed with Billboard Editorial Director Bill Werde at the event

Making their day: The pop star also posed with former X Factor contestants Emblem 3

However when the awards ceremony commenced, Justin and Selena were not seated together, instead sitting across the aisle from one another.

Rumours had been circulating the pair were back together since they were caught kissing backstage in Norway, and were then seen cuddling in a picture uploaded to Instagram by Justin last month before he deleted it.

The 19-year-old superstar and the former Disney starlet arrived in Vegas early, and were spotted at the Cirque du Soleil’s ‘Love’ show together on Friday night.

Justin tried to enter the Mirage venue incognito, but was rumbled when an onlooker shouted out his name.

He then spent the entire night ‘nuzzling right into’ his former girlfriend as they snacked on M&M chocolates, People magazine reported.

Hair-raising: During the awards show Selena performed her hit single Come & Get It

Golden girl: The songstress donned a gold gown featuring gold metal detailing

Beauty in black: Selena also graced the stage in black gown featuring sheer panelling at the side