Singer Rita Ora says she doesn't regret any time that she spent with ex-boyfriend and musician Calvin Harris when they were dating.

The couple recently ended their year-long relationship, but the 23-year-old singer SAYS she will "treasure the memories" she had with the 30-year-old, reports contactmusic.com.

"I don't usually address speculation but I've had an incredible time with Calvin, and I will treasure the memories. I've moved on so I hope people will respect that and do the same,` she tweeted.

Harris also used the social networking site last week to announce he had split with the `Never Let You Down` hitmaker "some time ago".

"To address speculation - myself and Rita ended our relationship some time ago. She is a beautiful, talented woman & I wish her all the best,` he wteeted.

The couple first split in January for a couple of weeks after a huge row but, despite getting back together, their hectic work schedules meant they rarely saw each other.