One lucky Enrique Iglesias fan got to do something most only dream about this morning on "Today" -- kiss the sexy singer on the lips on national TV ... live!

While singing "Hero" in the Plaza, Anna Kournikova's longtime BF picked one girl from the audience to come on stage, where he serenaded her and followed it up with a smooch.

After the performance, the girl said the liplock had her thinking "dirty thoughts." We don't blame her.