No one is having as much fun this fashion week as Betsey Johnson. At her Spring 2010 presentation yesterday, the ebulient Betsey was dancing, somersaulting, even drinking, much to Tinsley Mortimer's apparent discomfort. Would that everyone were so joyful, so energetic, so flexible, in their sixties! Click below for the pictures.

[All photos via Getty].

She does the splits!

She does cartwheels!                              She dances!

She is beloved by the young....                  by the old...

and by Fern Mallis!

And she can drink Tinsley Mortimer under the table!