Sarah Harding admitted the best thing about her engagement party was watching her mum and future mother-in-law dancing together.

The Girls Aloud singer and her fiance Tom Crane celebrated their betrothal with a bash at members-only club The Brompton, in London, last Monday (07.03.11) with family and celebrity friends.

The 'Biology' hitmaker couldn't keep the smile off her face when she saw her mother Marie showing off her best dance moves with Tom's mum.

She told Britain's HELLO! magazine: "It was really nice to have all the people I love and care about under one roof. One of the highlights was seeing our two mums strutting their stuff on the dancefloor. It all went past so quickly as there were so many people to catch up with, and before I knew it the evening was over. But it was everything I hoped it would be."

Sarah admits she was nervous before the party, because she had put so much effort into it to make it a success.

She added: "I had butterflies beforehand. This has felt like a wedding, with all the preparation."

The other guests included Sarah's Girls Aloud bandmates Kimberley Walsh and Nicola Roberts, Jason Statham and his model girlfriend Rosie Huntington-Whiteley and Jo Wood - the ex-wife of Ronnie Wood.