CHINS UP CHAPS!

Looks like One Direction's busy schedule is catching up on them.

Liam Payne and Zayn Malik were snapped looking a bit tired at a book signing at HMV, but can you blame them? As well as all the X Factor live shows, they're doing all these signings, and extra performances and interviews.





Awwww.

Although, admittedly, it could just be a bad photo taken at one slight nano-second when the guys weren't prepared...
Luckily they pull themselves together and are back to their usual perky selves in no time!