The singer-songwriter donned a sparkly black floor-length number and even managed a pair of silver stilettos – despite being taken to hospital on Sunday evening after slipping down a flight of stairs.
Abi, 19, teamed her glamorous dress – which featured a daring thigh-high split – with a satin black clutch bag for her red carpet appearance at the premiere of Thor: The Dark World at London's Odeon Leicester Square on Tuesday night.
She wore her brunette locks in soft curls and added a splash of colour with scarlet red lipstick.
Abi is understood to have fallen while waiting to hear the results of the X Factor votes on Sunday, and was later seen being carried out of the studios on a stretcher.
She was discharged from hospital the following day and she made an impressive comeback for the glitzy premiere supported by her fellow finalists Tamera Foster and Hannah Barrett.
“Me and my beautiful girls @OfficialTamera @HannahBMusic” tweeted Abi, with a snap of herself, Tamara and Hannah.
The photograph shows the trio posing on the red carpet, their arms affectionately around eachother’s waists.
Tamera, 16, is stunning in an eye-catching graphic print minidress teamed with a glittering clutch bag featuring a lip design.
Seventeen-year-old Hannah is equally as colourful in a leopard print jumpsuit with an orange leaf pattern.
The X Factor hopeful also tweeted a snap of herself before heading out to London's Leicester Square. "Pre premiere #Thor2 #nicehanger" she captioned the photo showing her striking a pose with a hand on her hip.