And looking at our exclusive photos, we can see why...

Tulisa Contostavlos had had enough of Fazers flirting before their break.

But what else caused The X Factor judge to ditch her N-Dubz bandmate and love of her life?

Further strain was put on the pair after Tulisa’s monumental rise to fame on the X Factor, which saw her and Fazer going from equals to Tulisa being the more successful and wealthier of the couple.

The pair bought an £800,000 flat in north London last June, with both their names on the lease.

However, it’s thought Tulisa, 23, might own the lion’s share. She also has a £40,000 Audi, while Fazer doesn’t drive.

After the split, Tulisa moved in with her PA Gareth Varey, while Fazer, 25, stayed in their flat.

She spent last week hitting the town, wearing a different outfit each night.

Her seven-day break up party included nightclub Movida on Saturday, Sketch restaurant on Monday and the National Television Awards on Wednesday.

But despite putting on a brave face and partying, Tulisa‘s secretly fuming – and the fallout’s already turning nasty.

Read the full story about Tulisa Contostavlos and Fazer’s split in the latest issue of Now dated 6 February 2012 – out now!

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SEE PICTURES Tulisa Contostavlos and N-Dubz at Radio 1 in London

SEE PICTURES Tulisa Contostavlos and N-Dubz at the Variety Club Showbiz Awards in London

SEE PICTURES N-Dubz at the Brit Awards 2010: Stars arrive on
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NEW PICTURES Tulisa Contostavlos Style File>>

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