I don't see why not
I was thinking the same thing, based on being able to discard/shuffle a hand of 0.
And I assume the Dull LS would get triggered as well.
I don't think the look and the toss next are connected at all. If I'm reading it correctly, the ability can be broken down (and abbreviated for brevity's sake) as:
"If alone, you may do one of the following:
- look at top X, take 1 and underdeck the rest
- toss the next EE
Cannot be interrupted."
I'm not sure if "looking" at the top 0 would trigger Dull or not but the whole ability is optional so you don't have to do either. I guess unless you're baiting a Music Leader to trigger, that is.