Usher's ex-wife isn't stressed about an alleged sex tape featuring the former couple.

Tameka Foster can't understand why people are so interested in the fact intimate video footage of the pair - who split in June 2009 after two years of marriage - is being touted for sale as they were doing nothing out of the ordinary for a married couple.

Yes, I cant stress over what I cant change.

She tweeted: "NEWSFLASH!! BREAKING NEWS! GUESS WHAT. I have copulated w/my husband! O_O. Why is this news again?? #ConfusedTweet. End of discussion."

"Yes, I cant stress over what I cant change. Hey I was married, happily. So theres a chance that we might . Its silly 'news' 2 me.

"folks are bored I guess, why do they CARE? Hes my ex- so sex was likely. I dont know abt any tapes, but why do they care?? (sic)"

Though the footage has not yet been made public, gossip website TMZ confirmed it is Usher and Tameka engaging in a series of X-rated acts.

It is believed the recording was among $1 million worth of items that were stolen from Usher's car in December 2009.

At the time, the 'OMG' hitmaker reported jewellery and two laptop computers had been taken from his vehicle.

A spokesperson for the 32-year-old singer - who has sons Usher V, three, and two-year-old Naviyd Eli together with Tameka - has not yet commented on the sex tape reports.