Included in this post are some explosive photos from the biggest music event in radio history!! The 2013 iHeartRadio Music festival went down last weekend at the MGM Grand Arena in Las Vegas. A long list of heavyweight musicians graced the stage including; Justin Timberlake, Paul McCartney, Katy Perry, Drake, J. Cole, TLC, Elton John, Miley Cyrus, Tiesto, Muse, Keith Urban, Chris Brown, Miguel, Bruno Mars, Zedd, Ke$sha, and Robin Thicke just to name a few. This massive 2-day event was a music lover's dream-come-true!…