Bruno Mars, JLS, Olly Murs, The Wanted, Cover Drive, Jessie J and Enrique Iglesias are just some of the stars to post messages on Twitter. Read them here.
No wedding bells for Enrique
They've been dating for nine years but there's still no sign of Enrique wedding Anna Kournikova.
The 'Heartbeat' star told Closer magazine, "I think marriage is great, but personally, I don't think it makes a lot of difference. It's too much of a commitment."
The 35 year old went on to add "Relationships are difficult - they're great when everything is going well but they're a lot of work too."
Enrique said Kournikova, now 29, was the only serious girlfriend he's ever had.
Ex tennis player says couple have no plans to tie the knot
It's claimed Enrique Iglesias has been lined up as the surprise choice to host the US version of the X Factor.
Enrique Iglesias has compared casting his new video to being a judge on 'American Idol'