Britney Spears is currently having another wedding ring made to replace her current one - because she wants a more uncommon diamond.

The pregnant TOXIC singer, who will celebrate her first wedding anniversary with Kevin Federline on 18 September (05), says she's not the biggest fan of her current wedding band, so she's upgrading.

She says, "This isn't the real one... Because I don't - I like this one, but I'm getting a newer one that's even better.

"It's totally a real diamond. But it's not the final. I like this, but it catches onto everything.

"I want something that's not as pokey-outy. The one I'm getting is a little bit flatter. And it's just more of a rare diamond."