Brandi and Camille tan in Hawaii.

How nasty will the reunion show be for the Real Housewives of Beverly Hills?

The first show airs tonight (Monday January 30, 2012) and Part I of the reunion show of a season so volatile that cast member Russell Armstrong hanged himself towards the end of the season should feature plenty of fireworks.

In one preview, RadarOnline.Com reveals Brandi Glanville backs Lisa Vanderpump in an alleged plot against the British transplant by the other ladies.

The claim is Kyle Richards, Camille Grammer, Adrienne Maloof and Taylor Armstrong were plotting something behind Lisa's back, but the acid tongue Brandi refused to go along.

See Brandi's sexy body in a tiny bikini here.

The report claims:

"The reality star has claimed that the other women plotted an attack on Lisa Vanderpump by secretly meeting to plan a strategy before the upcoming reunion was filmed, reported LynnNChicago.com, but Brandi refused to be a part of it.

“It was like Survivor, they meet up to go after one or the other and so you’ll hear me say, ‘I’m sorry I couldn’t make the meeting’ they planned it all beforehand,” Eddie Cibrian’s ex-wife revealed."

Will you watch the reunion shows?

(Image: WENN)