You bought me a coffee? You're the bee's knees!

The pants you are wearing are the bee's knees.

This sandwich that my wife made is the bee's-knees!

Thats the Bee's Knees

Try flavored yogurt; it's the bees' knees!

Lad's dad-Give this lighter to the bug-eyed, unstable looking girl smoking a cigarette. Yea, the one with the hair that looks like a mix between boy band and skater haircut, she will think you're the bees knees for that.
Lad- That's pretty straightforward and easy, that's all I have to do?

That jazz band is the bees knees