Iggy Azalea chooses her bridesmaid: Click to see

Iggy Azalea has chosen Demi Lovato as a bridesmaid for her upcoming marriage to baskeyball player Nick Young.

The 25-year-old rapper revealed the 'Heart Attack' hitmaker will be a key part of her wedding to her basketball playing fiancé Nick Young, and is hoping the 22-year-old singer will treat her guests to a ‘live’ performance when they eventually tie the knot.

She said: "Demi Lovato's going to be one of my bridesmaids. She'd better sing at my wedding!"

A file picture of actress/singer Demi Lovato at Arthur Ashe Kids Day at the USTA Billie Jean King National Tennis Center in New York. (AP)

However, the 30-year-old sportsman - who proposed to Iggy earlier this month at his birthday party - has high hopes of other musicians taking to the stage at their nuptials, most notably R. Kelly.

Speaking to James Corden in the Carpool Karaoke section of the 'The Late Late Show', she explained: "I don't know, but I know Nick really wants R. Kelly to sing at our wedding... He's trying to make it happen."

Meanwhile, the 'Fancy' singer recently revealed she is eager to wear a "big" wedding dress "with a train", because she would never get to wear one in her normal life.

She explained: "I think when you are a celebrity, you get to fortunately go on red carpets so much and wear the sexy silhouette gown and I've worn my fair share of those.

"But I never get to wear something big with a train, so I might do the whole thing."

Follow Emirates 24|7 on Google News.