(Cover) - EN Showbiz - Crystal Harris couldnt be happier about her engagement to Hugh Hefner.

The 24-year-old model-and-singer was proposed to by Playboy founder Hugh, 84, on Christmas Eve as they opened gifts at the Playboy Mansion.

Crystal was delighted to find the ring inside a Little Mermaid music box, especially when she heard Hugh utter the words I hope it fits.

Crystal was delighted by the proposal, and admits her family are thrilled for her too.

"Both my parents are super supportive of everything and whatever makes Hef and I happy makes them happy. I couldn't be happier," she beamed in an interview with E! Online.

The beauty wasnt actually surprised to receive the ring as she knew an engagement was on the cards. She had even been designing the band herself alongside Hughs secretary Mary O'Connor.

"I picked out the diamond with Mary," she enthused. "It all happened so fast and we're happy. Nothing's changed. Everything is the same."

Crystals stunning ring features a round diamond just over three karats and is on a platinum setting boasting diamonds along the entire band. It was actually too large, but has now been resized and fits like a glove.

The star says she and Hugh would like to marry in the summer, and Crystal wants a hands-on approach. She hopes to design her own dress, and plans for something intimate with close friends and family at the Playboy Mansion.

The model doesnt want to rush into having children though, as shes never really been the type, and is more interested in focusing on her career for now. She also isnt concerned with pre-nuptial agreements, although will go along with whatever Hugh desires.

"Whatever Hef wants me to do," she added. "I'm happy. I have the singing thing going for me and other things so whatever he wants. I don't know anything about that stuff. I don't care. Whatever." (C) Cover Media