Showing off her ample cleavage in the low-cut dress, and flaunting her slim figure and legs, Mariah raised eyebrows as she took revealing to the extreme at the event.Busty Mariah almost pops out ( Image: Flynet)

Wearing her long hair naturally curly, she looked happy and glowing as she showed off an incredible tan.

The backless number revealed all as she just managed to cover her bum with the small piece of material.

James meanwhile kept it simple in a smart black suit as he remained by his girlfriend’s side throughout.

The pair recently enjoyed a break in Spain, where James was snapped squeezing her bum as they walked along the beach on Tuesday.The backless dress was VERY racy ( Image: Flynet)

The couple have recently embarked on a whirlwind romance – and it looks to be going very well.

Mariah was wearing a colourful swimsuit for the outing, which she teamed with a vibrant pink sarong.

Meanwhile her fella, who stayed firmly by the singer’s side, looked somewhat overdressed in a white shirt and black trousers.

Seriously, that’s not suitable beach attire – but it’s nothing on her recent ensemble.