Zhè cì bǐsài tā dà chū fēngtóu, chéngle quán xiào de míngxīng.
She was in the limelight at this competition and became the school's star.
Tips
usage
出风头 on its own means to show off or seek the spotlight. The addition of 大 intensifies it: 'really steal the show'. It can carry a slightly negative connotation of showing off, depending on context.