By Lucretia Munro Strictly Come Dancing stars let their hair down in style when they partied until 3am – just hours before they were due to take to the stage for the launch of the live tour. The stars, including winner Ellie Leach and EastEnders star Bobby Brazier were at the Malmaison Hotel in Birmingham, where bosses hired the entire mezzanine floor for a whopping £3,000. All the celebrities that took part in the BBC dance show were treated to a dinner of steak and seabass before enjoying a free bar of cocktails and beer. And according to reports, the party was in full swing as they played s…