Two of music's biggest superstars ending their feud? The music video that bringing them together along with a host of celebrity cameos.

Plus, OJ Simpson is speaking out to finally set the record straight about a "Kardashian" rumor.

And, how one late night host pulled off the ultimate Hollywood showdown in London.

Then, remembering Gloria Vanderbilt and her incredible fashion legacy.

Entertainment Begins and Ends with ET.