For all those people hoping that Girls Aloud were slipping off their perch, think again. Biology is yet more proof that Xenomania write the best pop songs around and that Girls Aloud are pretty much the perfect group to sing them.
This breaks all the rules of manufactured pop - it starts with a riff aping an old blues track before spiralling off into a pure Euro-pop direction, it has some bizarrely surreal lyrics which mention Cappuccino to go, "one Alabama return" and the phrase "comes back to bite your behind" and it waits a full two minutes before introducing a chorus so life-enhancing it should be on the NHS. Never mind the X-Factor, it's got the 'what the hell' factor written all over it.
Quite honestly, it's the single of the year and is quite, quite brilliant. Ignore what your oh-so-cool mates say and surrender to the pop majesty of Girls Aloud.