Sharon Osbourne has revealed that someone fraudulently "maxed out" her and husband Ozzy's credit cards.

Speaking on US TV show, The Talk, Sharon told her co-hosts that she had been trying to buy her daughter Kelly a birthday present when she discovered that her credit cards were "maxed out".

She said: "It's my Kelly's birthday today, I went out last night to pick up her gift. I give my credit card and they come back and say, 'Do you have another credit card? It didn't go through.' I say, 'Just try it again'… still didn't go through... I hand them Ozzy's.

"Then, they come back and go, 'Do you have another one? It didn't go through.' Someone rang up charges and maxed out Ozzy's card and my card," she continued.

"I called through to the credit card company and they go, 'No, no, no, you're maxed out, so is Ozzy.' I'm like, 'I don't go to that store, or to that store.' "

When co-host Eve asked, "So wait, it was fraud?" Sharon answered, "Yeah". She added that the credit card company are currently investigating what happened.