AP ShowBiz MinuteHalle Berry's ex-boyfriend Gabriel Aubry has been arrested after he and the actress' current partner,French actor Olivier Martinez, got in a fist fight at her home on Thanksgiving.Aubry was taken to a hospital for his injuries and was later booked for investigation of battery, then released on $20,000 bail.Berry and Aubry have been involved in a custody dispute involving their daughter Nahla.Madonna is no longer threat to minors in St. Petersburg.A local court threw out the Trade Union of Russian Citizens' lawsuit and the $ 10.7 million in damagesit sought from the performer for allegedly promoting homosexuality to minors during a concert.The singer spoke up for gay rights during one of her Russian shows that drew fans as young as twelve.Chris Brown has canceled a stadium concert in Guyana after local protests over his 2009 beating of then-girlfriend Rihanna.The R&B singer was billed to headline a December 26 show, but local women's rights groups and opposition lawmakers said Brown would not be welcome in Guyana.Brown backed out, citing discomfort with the protests.This is Zara Younis with AP ShowBiz Minute.