The former page 3 girl, 22, was the first to be voted off the BBC1 talent show earlier this month.
Meanwhile, Hollyoaks actress Hollie-Jay Bowes, 21, wore a blue baby doll dress matched with pale pink cardigan and cream heels. Kieron Richardson also made an appearance, posing with his ice skating partner Brianne and co-star Miss Bowes.
Miss Atack wore a black dress, heels and tights looking very similar to recent Over The Rainbow star Amy Diamond.
She competed in pair skating and now skates in various ice shows.
She has appeared on the British television programme Dancing on Ice and on March 27, 2011, her partner Sam Attwater was crowned the winner.
According to the Sunday Mirror Shona – who plays Whitney in the BBC One soap – ended their 18-month romance after claiming they had ‘drifted apart’ since he began competing on the show.
And while Brianne – who has reportedly been dating former Dancing On Ice contestant Danny Young – was not cited as the reason for the split, sources told the paper she was not happy with the skater’s close friendship with Matt.