Avril Lavigne ''pushed'' her boundaries for her new album.

The 28-year-old singer is set to release her follow up from 2011's 'Goodbye Lullaby' and has thoroughly explored her emotions for the record, insisting she is proud for having a ''completely different getup'' to other female artists since first appearing on the music scene in 2002 with her track 'Complicated'.

She told Nylon magazine: ''Lyrically, I pushed myself to talk about different subjects I haven't talked about before. I didn't want to be so simple. I tried to really express myself and go deeper.

''I wasn't the girl baring her midriff with backup dancers and a headset microphone. I came out and had a lot to say with my lyrics, and I played the guitar. I had a completely different getup, stage presence, everything.''

The 'He Wasn't' musician recently revealed she has teamed up with goth rocker Marilyn Manson for a track on her upcoming fifth LP and admitted the ''heavier'' material came about very spontaneously.

She previously said: ''It was last minute [the song came about]. I was sitting there at the board thinking Manson would be perfect on this track, so I texted him and he's like, 'I'll come over and hear it.' So he came at four o'clock in the morning... Yes, it was one of those nights.''