United Kingdom, Feb. 11 -- Matt Willis' wedding day "wasn't the greatest day" for him.

The Busted rocker married spouse Emma in 2008 just three days after he got out of rehab, where he had been receiving treatment for drug and alcohol addiction, and he has candidly admitted he "shouldn't have been there" because he'd have preferred to tie the knot when he was comfortable with his sobriety.

He said on his On The Mend podcast: "It was not the greatest of days for me. It was a weird thing getting married when you're scared.

"Everyone knew I'd just been out of rehab. Everyone knew what a mess I was. Like it had been quite apparent to everybody.

"I think they were surprised that I was there and that she was there.

"We were watching our we...