Liam Payne: “Strip That Down” feat.

By shifting his sound and lyrics, Payne was able to reach a more mature and growing audience.

“Strip That Down” ended up hitting No.

One Direction

Credit: Kevin Mazur/WireImage

With “Falling,” he offers up the prettiest track ever written about self-loathing.

Harry Styles: “Kiwi”

Unlike the message of thisenduring meme, Stylesdoeshave the range.

This track about Styles' dalliance with an unnamed girl was equal parts sexy and tongue-in-cheek.

The lyrics tell a charming tale of Horan meeting a new woman and probably hoping for a one-night stand.

“Ruth Kinane

6.

On “Watermelon Sugar,” Styles welcomes us with a wistful acoustic wind.

Don’t let your mind wander too long about what Styles is actually lusting over.O.S.

The thump of the bass paired with his dreamy falsetto gives a needed electric jolt to listeners.

Marcus Jones

3.

Niall Horan: “Slow Hands”

Niall Horan is by far the biggest solo surprise of the bunch.

The group’s token blonde has always had undeniable talent but was mostly positioned as a supporting character.

M.J.

2.

It proved his range, vocally and as a songwriter.

Apparently, there was way more going on behind those soulful doe eyes.