We haven't seen much of Natasha since the Celebrity Big Brother final earlier this month, but last night she joined her 5ive star boyfriend at the glamorous party.
The couple smiled for the cameras outside the glamorous 8 Northumberland Avenue venue in London, before heading inside to join a string of stars including Lucy Mecklenburgh, Emma Bunton and Anne Robinson.
Both Natasha and Ritchie were wearing their specs for the party (obvs!) We're pretty sure those are the same cat-eye shaped glasses Natasha wore throughout CBB and we loved!
Natasha finished CBB in third place after winning over her housemates and the public with her cool, calm and collected demeanour.
The Atomic Kitten star has said that being away from Ritchie and her four children was the hardest thing she'd ever done and she couldn't leave them for that long again.
She and Ritchie have daughter Ella, one, while Natasha is also mum to sons Josh, 13, Harry, ten, and Alfie, four, from previous relationships.