Adam Lambert has commented on his transformation as an artist since appearing on American Idol.

The singer rose to national fame after he finished as a runner-up on the US reality TV show in 2009 and five years have now passed since he made his debut on the programme.

Since then, the vocal powerhouse has released two studio albums and has performed live many times as a solo artist and also with Queen.

Taking to Twitter to reflect on his rise to prominence, Lambert tweeted: "My first Idol audition aired 5 years ago. I can't believe it's only been 5 years! I feel like I've gone thru such an amazing evolution."

He continued: "I can't wait to share with you all where my heart and mind are currently thriving. Without you all, there'd be no show and tell. This next chapter is going to be so pure. I'm so excited!!! Let's get real."

Lambert is expected to release his third album his coming year.