We can't help but smile every time we see the Mullingar superstar perform and this time is no different.
A few weeks ago Niall tweeted in support of his friend Julia Michaels' new EP Inner Monologue Part 1.
Julia and Niall have worked on a number of projects together and she joined him as the support act for his Flicker World Tour.
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Happy birthday to one of the best @juliamichaels . Miss ya bud x
Since his split from singer Hailee Steinfeld a few months ago, Niall's close relationship with Julia has had tongues wagging - but we're 99% sure they're just friends... we think.
The pair appeared on The Late Late Show with James Corden last night to perform their new single What A Time.
You can check out the full performance here: