Ever since hooking up on the set of “Heroes” with co-star Milo Ventimiglia, Hayden Panettiere has had to deal with all kinds of tabloid and webloid gossip about her love life.  So we gave her a chance to respond to any and all rumors, allegations, and speculations that might be floating around about her.  One thing’s a fact:  Her new movie, “I Love You Beth Cooper,” opens nationwide on July 10.   (CLICK ON THE MEDIA BAR BELOW TO HEAR HAYEN PANETTIERE)