Stars are just like us. They turn weird when famous people are around.

 

1. When Mark Ruffalo spotted Paul Rudd

via MTV

 

2. Emma Stone got a message from Scary Spice:

via uproxx

 

3. Jennifer Lawrence couldn't handle Jeff Bridges:

via teen

 

4. The Biebs copped a photo op with Michael Jordan:
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via Bleacher Report