They're no longer on the same Bravo show, but there's new drama between 'Real Housewives of NYC' cast member Ramona Singer and 'Bethenny Ever After' star Bethenny Frankel.

According to RadarOnline.com, Singer is upset that her own plan to build a successful business empire like Frankel hasn't worked as well as she hoped, and jealousy is starting to take over.

"Ramona has always been jealous of Bethenny and didn't even want her on the show at first," a source revealed to Radar.

Singer and Frankel appeared together on the first three seasons of 'The Real Housewives of NYC.' In 2010, Frankel left 'Real Housewives' to film her own spin-off show after a tumultuous 'Housewives' season resulted in the disintegration of her friendship with cast member Jill Zarin.