The R&B queen herself gets involved...

All Siobhan wanted for her birthday was a Mariah Carey themed cake.

Yet when the pop fan settled down for her surprise she got a bit of a shock - it was decorated with pioneering physicist Marie Curie instead.

Not quite the same, one would have thought. A picture of the cake made its way online, where it promptly went viral.

Mariah Carey, though, didn't seem to mind - and even wished Siobhan a 'Happy Birthday' on Twitter...

Join us on Vero, as we get under the skin of global cultural happenings. Follow Clash Magazine as we skip merrily between clubs, concerts, interviews and photo shoots. Get backstage sneak peeks and a true view into our world as the fun and games unfold.

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