Rihanna reportedly showed up late to her Diamonds World tour concert in Antwerp last week. According to RadarOnline.com, the singer showed up to two performances two hours late and some fans said that she was "drunk," "stoned" and lip-synching. Music critic Sasha Van Der Speeten of the Standard Newspaper said about RiRi's Wednesday night performance (June 5th) in a review, "There was a wall of reinforced concrete between Rihanna and the public at Sportpaleis.The pop icon played almost two hours on autopilot. ... It had the effect of a Valium overdose." She added, "Just some words. Shameless, careless," she claimed. "How f*****g lazy and complacent can you get, girl? Besides the bored swaying back and forth like a drugged rich baby during We Found Love, she didn't dance." Rihanna was recently performing in Belgium when she pulled a fan on stage and gave him a lapdance.