Rumours Jennifer Lopez and Marc Anthony's marriage is on the rocks refuse to go away - a new report predicts the pair will split shortly after Valentine's Day.

The singer/actress sparked speculation of a pending divorce after she was photographed without her wedding ring at a film premiere in December - weeks after the couple renewed their wedding vows in a secret Las Vegas ceremony in October.

And although the couple's spokesperson recently declared the pair are "doing great" in an official statement, the New York Daily News has reported a split announcement is imminent.

A source tells the publication, "Marc and Jennifer are planning on announcing their divorce right after Marc's show at Madison Square Garden on February 14.

"Jennifer is planning on joining Marc onstage for a surprise duet. Things haven't been right for a while now, and they thought it would be a bittersweet farewell... They're definitely planning a clean break in February."

However, a representative for Anthony insists "none of the rumours are true".

Lopez and Anthony, the parents of 10-month-old twins Max and Emme, wed in a private home wedding in June of 2004.