Avril Lavigne is putting the finishing touches to her new album.

The 'Complicated' singer has been working with Nickelback's Chad Kroeger - now her fiance - on her fifth album, and is currently at the stage of mixing the tracks.

L.A. Reid, boss of Avril's label, Epic Records, told Billboard magazine: ''We're in the mixing process now and I expect to release it very soon.

''I'd like to get it out this year, but time seems to be flying. If we don't, it will be [beginning] of the new year.

''She worked with Chad Kroeger and they did a really good record.''

Avril, 27, and Chad, 37, met when they started working on her album together and dated for six months before getting engaged.

Chad has said he feels like the ''luckiest person alive'' to be with Avril, and admitted he knew their working partnership was turning into something else.

He said: ''I knew I was falling for her. It was incredibly powerful and something I'll never forget. I feel like the luckiest person alive because I get to be with my best friend every day.''

Avril added her new love makes her laugh constantly and looks after her closely.

She said: ''He makes me laugh every day. He takes care of me in every way and is extremely attentive.''

Avril's new album will be her first since 2009's 'Goodbye Lullaby', which was partly produced by her ex-husband Deryck Whibley.