Not for nothing is Adam Lambert known as Glambert, which makes his US mainstream success all the more surprising. In May, he became the first out gay singer to have a No 1 album there – an album that begins with a song that cheerily waves a red rag at homophobes. "No trespassers?/ Yeah, my ass!/ Wait'll you get a load of me," he snorts over Pharrell Williams' boing-boing disco production. But apart from the atypically sombre Outlaws of Love, which contends that gay equality is still years away, this record is mainly about Glambert rather than issues. And it's perfectly enjoyable, even if a phalanx of the usual producers (Williams, Dr Luke) has ensured that it sounds like most other 2012 pop-dance albums. He bounces from hot, hedonistic nights (Kickin' In, a brittle, 90s-style synthpopper) to man-in-the-mirror introspection (Underneath, a windswept ballad that, more than anything else here, reminds us of his American Idol provenance), and if few of the songs are classics, his octave-leaping voice is often a showstopper. If nothing else, Trespassing whets the appetite for the next (hopefully quirkier) record.