DJ forks out on the gift for her 22nd birthday

Samantha Ronson has splashed out £11,000 on a Cartier diamond ring for rumoured girlfriend Lindsay Lohan.

The music DJ – who is Mark Ronson’s younger sister – gave the actress the gift for her birthday.

‘Sam took Lindsay shopping to celebrate her 22nd birthday,’ a source tells the Daily Mirror.

‘Although Lindsay is the major breadwinner, Sam has her own money and is very proud.

‘It’s not an engagement ring – simply a token of her commitment.’

Yesterday, Linds and Sam, 30, went shopping and enjoyed a late lunch in LA.