Like most of you, I was transfixed to the live Ultra stream all last weekend. Intently watching who's hot, who's not, is something of a hobby of mine as I'm always on the lookout to see who's moving music forward. In search of the new and unexpected is what Ultra is all about. Now is an important time in the electronic dance music world as each DJ set is a window into what you'll expect to hear from them for the rest of the year.

This year's Ultra Music Festival was a real treat to watch thanks to a few surprises. Here are a few of them:

1. Axwell /\ Ingrosso playing "Deep Down Low" by Valentino Khan

Did Axwell /\ Ingrosso actually play an OWSLA track at their headlining set at Ultra? You bet they did. It was an unexpected moment that set up a very strong second half of their performance.

Starts at the 19:19 mark: