Hollywood actress Drew Barrymore was reportedly so busy partying that she missed the promotion of her directorial debut 'Whip It'. The 'Charlie's Angels' star was having fun all weekend at the Toronto Film Festival where the roller derby movie was screened and failed to make it for the promotion,reported New York Post. "They had a press junket for 'Whip It' at the Park Hyatt,and Drew completely bailed," a source reports. Barrymore might have been partying too hard with her pal Amanda Seyfried,who also stars in 'Jennifer's Body,' a couple of nights before at a Nikki Beach bash. "They reason she cancelled is supposedly because she lost her voice," said another source. Although she might not have turned up this time,but Barrymore has gone a long way to promote 'Whip It'. Be it dyeing the ends of her blonde hair black or smooching the leading lady Ellen Page on camera,the 34-year-old actress has done it all.