Mel B looks incredible in a red cut-out maxi dress as she joins her fellow ... trends now

Mel B looked incredible as she joined her fellow Spice Girls as well as Hollywood A-listers to celebrate Victoria Beckham's 50th birthday party on Saturday.

The singer, 48, caught the eye in a stunning red cut-out maxi dress.

She drew attention to her stunning figure in the number as she made a stylish entrance at swanky Mayfair private members' club Oswald's.

The garment, which perfectly hugged Mel's toned figure, featured halter thin straps, as she opted to keep her jewellery to the minimum with just a classy watch.

The songstress oozed glamour with animal print stiletto heels, and carried the essentials for the glitzy party in a chic shoulder bag, and finished off with a glamorous make-up. 

The Spice Girls reunited to celebrate their dear Posh Spice's milestone birthday in an exclusive and luxurious bash where guests enjoyed dinner, fizz and cocktails – and dancing into the early hours.

But what made the night particularly special for the birthday girl, said friends, was having all of the girlband members in the same room.

That and a sprinkling of Hollywood glamour in the form of Tom Cruise and actress Eva Longoria.

Even Geri Horner turned up with a smile, one of the last to arrive, having seemingly moved on from the 'sexting' scandal involving her husband, Red Bull Racing boss Christian Horner. He was absent though, due to work commitments. 

Emma Bunton arrived with husband Jade Jones, closely followed by Melanie Chisholm and then Mel B.   

'It meant the world to Victoria that they were all there,' said a friend. 'They were a huge part of her life and they shared so much together. 

'They were special days and so of course to have them there to mark her 50th was just wonderful for her. It made everything so perfect.'

The party was just one of several celebrations to mark her half century, which fell on Wednesday.