Sylvester Stallone's wife Jennifer Flavin has joined a court battle against Michael Jackson's dermatologist ARNE KLEIN.

The model-turned-cosmetics queen will testify on her friend IRENA MEDAVOY's behalf as the actress takes Klein to court over an alleged botched Botox makeover that forced her to pull out of a TV series.

Medavoy, who is married to Rocky producer Mike Medavoy, insists she wasn't warned about the risk of Botox injections.

25/05/2004 09:13