As usual with my Sunday Sweets, I don't have the credits for all these photos, so if you recognize a cake please let me know who made it so I can link to their site. Thanks!
First up, a cute-as-a-button Strawberry Shortcake Cake from Pink Apron:

I like that she used sugar cookies instead of solid fondant for the name (and probably the strawberries, too, although I can't be sure); I'm always in favor of a cake being as edible as possible. The colors, the little flowers - it all just works. Love it.
Next up is a super fun cake that's surprisingly easy to make, considering how cool it looks:

See, I know it's easy, because I actually made one before. Yeah - me. (This is not it.) You can also make the popcorn using fondant, but it's much easier (and yummier) to make it with icing.
This next one uses a nifty icing technique where you dab it on with a brush or sponge:

And finally, here's a great example of all kinds of different piping techniques:

The best part is anyone who has taken the Wilton classes can make this cake; I'm pretty sure they teach every technique used here, including the flowers. I'm not plugging for Wilton, mind you (I haven't forgiven them yet for those CCC kits) - but I've known some great Wilton instructors in my time.