Adam Lambert reckons his new album Trespassing will raise eyebrows among his fans.

The former American Idol winner, 30, is set to release his second record, on which he collaborated with the likes of Bruno Mars, Pharrell Williams and Dr Luke.

Glam rocker Adam - who co-wrote many of the songs on the album, due out in July - revealed: "I had time to make this album. I do feel that sonically, lyrically and emotionally, this album is a surprise for people - and myself."

Adam's previous record, For Your Entertainment, debuted at number three on the US Billboard charts in 2009, the year he finished as runner-up on Idol.

He said of TV talent shows such as Idol, The Voice and X Factor: "I think that it's great that there are shows out there giving people that platform. It's really difficult to make it in the music industry.

"These shows are great because they show what the person is capable of and their journey and process of becoming an artist... I think the difficult thing is the transition between TV competition series and going into the actual music industry. There still seems to be a slight disconnect there. Hopefully, they're fixing that."

And Adam admitted coming back to real life after the American Idol hype died down was "a bit of a shock".

"You kind of have to decompress, and I had some failed romantic situations, and I was a bit tired and worn out, so at the beginning of the writing process, there was some darkness I was working through, which was great," he added.

"It was real. It was visceral. Then, I got in my relationship, I started relaxing and having more time to myself with my friends and wanting to go out again - shopping, rediscovering culture and life."