The 'Sk8r Boi' hitmaker has released a new song, 'Here's To Never Growing Up' - co-written with fiance Chad Kroeger and taken from her forthcoming fifth album - and the lyrics reference the Thom Yorke-fronted British band.
In the track, she sings the line: ''Singing Radiohead at the top of our lungs / with the boombox blaring as we're falling in love.''
The acoustic song, and its Radiohead lyric in particular, has already attracted praise from one celebrity fan.
Ryan Seacrest tweeted: ''Just heard the song @AvrilLavigne, love it...so psyched. Love the radiohead lyric (sic)''
Chad recently admitted he works with Avril in a different way to how he writes for his rock band.
He explained: ''Obviously with her I wasn't going to tune the guitars down and put on as much distortion as possible.
''You start acoustically, with a piano, and you start moving that way. When I'm with her, I'm mostly the lyric guy, she does a lot of the melody and I'll help out with lyrics and chord progressions wherever I can.''