Rita Ora ensured all eyes were on her at the Billboard Music Awards 2015 by going commando in a white dress slashed up the thigh.

The 'Poison' singer sent pulses racing on the red carpet as she made her entrance in the daring white Fausto Puglisi gown which left little to the imagination and showed off lots of side-bum and leg.

The gown was held together with some strategically placed bold golden suns to protect her modesty, and Rita admitted to 'Fashion Police' host Giuliana Rancic she felt ''a bit naked'' as she had to ditch her underwear in order to slip her enviable curves into the dress.

Perhaps, Rita was trying to show her ex-boyfriend Calvin Harris exactly what he was missing since their bitter break-up.

However, the superstar DJ didn't seem to be pining for his former lover when he was seen in the audience sharing a kiss and a hug with his new girlfriend Taylor Swift when she was announced as the winner of the coveted Top 200 Album award for her fifth studio album '1989'.

The kiss wasn't the only time the pair were seen getting close and personal during the ceremony, as they celebrated the slew of nine awards they won between them with other displays of affection, including Calvin wrapping his arms around Taylor, 25.

Still, at least Rita could console herself that she had outshone Taylor in the fashion stakes as well as her other pop peers such as Mariah Carey and Meghan Trainor.

'We Belong Together' singer Mariah opted for a black Tom Ford dress that failed to flatter, while Meghan was just over-dressed in a glittery floor-length evening gown.