The singer showed off her tanned legs in a pair of gorgeous, feminine shorts and a matching T-shirt at the Blu Ray premiere of the classic movie, held on Thursday (29 August) at the Royal Albert Hall.
Stacey, 23, shunned that red carpet favourite of heels in favour of gold sandals, and kept her blonde locks smooth and sleek.
The mother-of-two brought five-year-old son Zachary along for the day, but appeared to have left one-year-old son Leighton at home.
Stacey told Reveal back in May that being a mum is the best job in the world.
"When I have my next child, I'd really like a girl," she said. "If I have another boy it could be endless, I'll just keep trying and trying until I get a girl!"