So pretty! So impractical! Art for your head!

Now I remember what got me onto this, it was this Doctor Who story, with a very young Donna and a Sixth Doctor:

When We Were Six by aralias
The Doctor takes Peri on holiday to Devon, except it isn't Devon: it's Strathclyde.

“Yep,” Peri said. She opened the hat box, removed a large pink hat from its depths, and placed it on her head. “What do you think? Nice, huh?”

“…It’s a bit impractical,” the Doctor said dubiously. “Unless we land on the lost Planet of the Hats, but I don’t think that’s likely.”

“There’s a Planet of the Hats?” Donna asked.)

(to which I say, there should be.)