Check what's under the mouse?

I have a movieclip that lists a bunch of song artists, and I need to find out which movieclip is underneath the mouse at a given time.

They are all different sizes so I can’t run a simple for loop.

The only thing I could think of would be to add each movieclip to a huge array and then loop through the array checking each item’s position and width/height to determine whether the mouse lies over that specific item.

That seems REALLY inefficient though…

Any help?