Victoria Beckham asked Lady Gaga for her autograph when she met her on Sunday (08.12.13).

The fashion designer spoke to the 'Do What U Want' hitmaker backstage at Capital FM's Jingle Bell Ball concert at The O2 in London and she was so excited to meet the pop superstar she got a memento of the meet-up.

Victoria also praised Gaga for being really friendly to her children - sons Brooklyn, 14, Romeo, 12, Cruz, nine, and two year old daughter Harper.

She wrote on Twitter: ''Met @ladygaga last night, so sweet to the boys and Harper. What a show, she is AMAZING!!x vb. (sic)''

Victoria, 39, also uploaded a photograph with her tweet which showed a personalised Lady Gaga Cadbury's chocolate bar which the star had signed and added the message ''The Beckhams, Merry Christmas!''

The Beckhams then watched the concert which had a line-up featuring Jessie J, Little Mix, Jason Derulo, Dizzee Rascal and headlined by Gaga.

Former Spice Girl Victoria has long been an admirer of Gaga, 27, and recently praised her eye-catching style choices.

She said: ''I think she is obviously incredibly, very, very talented. ''She writes all of her songs, she can really sing. She is a phenomenon. I have a lot of respect that she can walk in those shoes going through airports.

''I mean, goodness, people think I dress up to go to an airport! I think she's really doing her thing. That's her.''