Andrew wowed the judges during Saturday's programme with his diva-style rendition of Jocelyn Brown's Somebody Else's Guy.The approval from the panel was even more surprising for Andrew, 31, as he stormed the stage more than a decade after auditioning for Simon Cowell on Pop Idol."Before I wasn't being true to myself," Andrew said. "When I did Pop Idol I was trying to be straight and sing the wrong songs. It's all down to being yourself."I was doing panto with Louie Spence and he said you've got to do BGT. I believe in timing and now is the right time. It is one of my favourite shows, I just couldn't see myself on it."Despite having appeared in major musicals including We Will Rock You and Joseph, Andrew was not prepared for how he would feeling taking to the BGT stage."Singing live like that you get so nervous," he said. "Suddenly you're thrown in front of 1,000s of people and the judges and the adrenalin goes through the roof. You want to do the best you can. I don't even remember doing the audition now."While Andrew's audition had all four judges on their feet, they did feel he was "trying to please too much"."I will tone it down a bit if I get into the semi-finals," Andrew said. "But I'll still be true to myself. I massively wanted to impress Simon and I'd be a fool not to take his comments on board. If you can't take criticism, you're in the wrong industry"I've never taken another career, I've just kept going because I know it will happen one day."