If you’re not a big Instagram user, you might ask “Sean Who?” – but with more than 1 million followers on Instagram, 25-year-old Sean O’Donnell is a big social media star. Plus, he has a fun YouTube channel…

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Sean O'Donnell towel
Photo: Instagram

Your next question might be – why should I care? Oh you will care, once you see his abs. (And, you know, he celebrated his birthday this week – so there’s that).

There you go:

1. A working man

2. The thing with the shirt

3. Just sitting there

4. Nice arms, too!

5. Pool time

6. Some more fun at the pool

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Not a bad way to start off the week☀️

A post shared by Sean O'Donnell (@theseanodonnell) on

7. Summer time

8. Gotta have a bathroom selfie!

9. He spends a lot of time at the pool

10. You have to work for your abs

11. Bed time?

12. Chilling

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Sunday mood.🌹

A post shared by Sean O'Donnell (@theseanodonnell) on

13. Over and out

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