The likes of Jessie J and Florence Welch have teamed up with Sir Elton John to promote Aids awareness on Valentine's Day.

A host of stars, who also include Kelly Osbourne, are set to prick their fingers and tweet a photo of their blood with the caption 'Love is in our blood'.

It hopes to raise awareness of Aids and defeat prejudice against those with the disease. John said in a statement:

"Now more than ever we know how to beat Aids. Thanks to incredible work by the Aids community over the past 20 years we now have affordable, quality treatment which saves lives and dramatically reduces the chances of passing on HIV. But these medicines don't work against prejudice and discrimination."

He continued: "It's time to stop treating people who are most vulnerable to HIV as outcasts. Everyone deserves the chance to protect themselves. Surely we have enough love for that."

Sir Elton John's Aids Foundation meanwhile is celebrating its 20th anniversary in 2013.