Oh look. Zac Efon's friend, Sam Miro appears to have forgotten her trousers.
Elsewhere, Yolanda Foster was looking good as she shopped in Beverly Hills, and Simon Cowell posed with fans ahead of Britain's Got Talent auditions in the UK.
See what else your favorite stars were up to in today's sightings.
1. Zac Efron Heads Into Jimmy Kimmel Live! Studios
2. Yolanda Foster Shops in Beverly Hills
3. Hilary Duff Stops By Coffee Bean & Tea Leaf
4. Matthew Perry Outside BBC Radio 2 Studios
5. Khloe Kardashian Shares a 2007 Flashback Photo
6. Joe Jonas and DNC: CTV The Social Talk Show Appearance
Wait! There's more Zac Efron, The Girl With No Pants & More: Star Sightings 1.22.2016! Just click "Next" below:Next
- Malin Akerman, Zac Efron, Joe Jonas, Hilary Duff, Simon Cowell, Yolanda Foster, Lance Bass, Kendall Jenner, Khloe Kardashian, Kim Kardashian, Chrissy Teigen
- Ellie Goulding, Matthew Perry
- Related Photos:
- Malin Akerman Slideshows, Zac Efron Slideshows, Joe Jonas Slideshows, Hilary Duff Slideshows, Simon Cowell Slideshows, Yolanda Foster Slideshows, Ellie Goulding Slideshows, Lance Bass Slideshows, Kendall Jenner Slideshows, Matthew Perry Slideshows, Khloe Kardashian Slideshows, Kim Kardashian Slideshows, Chrissy Teigen Slideshows
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- Created by:
- Kelly Lynch