Following their 2014 split, Mariah Carey has made it clear that she's completely moved on from estranged husband Nick Cannon. But even though the 46-year-old singer is now engaged to billionaire James Packer, the father of her four-year-old twins is reportedly refusing to sign their divorce papers.

According to TMZ, sources close to the former couple revealed that Carey has been trying to get Cannon to make it official for almost a year but he will not budge. The 35-year-old actor has apparently repeatedly declined to sign the agreement forms, which would finalize the divorce, and has not explained why. In fact, TMZ says that the Hero songstress is getting frustrated and she wants out now.

The couple separated in August 2014 and Cannon filed for the separation in December that year. Even though Cannon is not in a relationship, Carey's has found love again with Australian businessman Packer. The pair became engaged in January during an intimate dinner in the in her New York hometown in the presence of their friends and family.

The engagement came eight months into their romance. Carey has made no attempt at disguising her affection for the 48-year-old casino mogul, inviting him onto the stage at her Valentine's Day show for a loving kiss. Earlier this year, the pop diva described her relationship with Packer on Low Down with Diana as a "fantasy".

If Carry and Packer do get hitched, it will be Carey's third trip down the aisle, having previously tied the knot with Cannon and music executive Tommy Mottola in 1993. Packer has also been married twice before. He exchanged vows with first wife Jodhi Meares in 1999 before parting ways in 2002. He separated from his second wife Ericka, with whom he has three children, in 2013.

20th Annual Screen Actors Guild Awards - Red Carpet
Singer-actress Mariah Carey and TV personality Nick Cannon attend the 20th Annual Screen Actors Guild Awards at The Shrine Auditorium on January 18, 2014Kevork Djansezian/Getty