The curse of the comeback tour: As Nadine Coyle awkwardly forgets her lyrics at Girls Aloud gig, a look at cringeworthy moments that blighted other reunions - from painful backflips to dodgy dance moves and some VERY unfortunate outfits
While comeback tours may not seem that daunting - after all, they're singing hits they've performed for years - they don't always go off without a hitch.