"Walls" is a song by English singer-songwriter Louis Tomlinson, the fifth and the final single and the title track from his debut studio album of the same name.

[6] Writing for MTV, Madeline Roth called "Walls" "an emotional declaration of strength" on which Tomlinson "acknowledges the struggles he's faced with introspective, heartbreaking observations", "cracks the sadness open and lets a little light in by revealing that the hard times have made him a stronger man", and praised the addition of a live orchestra to the song which "ups the emotional ante" and "takes this ballad to beautiful heights".

[7] Charu Sinha of Vulture called the track "slow and introspective", "easy listening, lonely pop rock reminiscent of the 2000s (think early Green Day, but with an inspirational, self-help slant)".

[1] Phil Arnold of Music Talkers called "Walls" "a very good song, with all the components that will appeal to a wide demographic" and praised its "smart production" and Tomlinson's "accomplished song-writing" and "mature vocal".

[8] "When the song starts you get a classic feeling of piano and guitar working together to provide a really well crafted introduction then the vocal has a retro EQ on it to give atmosphere to the lyrics.

What really stands out though, is the fact that this is an original and has been written by someone who’s not only a singer and performer, but also a very talented songwriter who writes catchy melodies and supports that with lyrics that go a bit deeper than your average pop song and make you really think about the meaning.