They went away and came back with a bang...
Britney Spears had her actual comeback way back in 2007, but 2009 was the year that she was properly noticed for her improvement.
A clip from Britney's video for '3' - we think she looks amazingly in shape here.
This year, the singer got in shape for her Circus world tour and shocked us when she released her racy new single '3' for her greatest hits album.
Britney has also kept her love life on the lowdown for once, despite rumours that she's dating her agent, the mum of two has kept quiet about the details, learning from past mistakes. We've loved seeing photos of Britney, the single Mum, playing with her two boys while on tour!
Britney and one of her sons relaxing in the pool while on tour in Sydney - he's so cute!
2009 was also the year that Britney started winning awards, like the Ultimate Choice Award at the Teen Choice Awards and Best Pop Video for 'Womanizer' at the VMAs.
Here's Britney with her Ultimate Choice Award at the Teen Choice Awards 2009.
Do you think Brit's made a better comeback this year?
Click next for more comebacks...