Libya on Saturday threatened to attack a North Korean-flagged tanker if it tries to ship oil from a rebel-controlled port, in a major escalation of a standoff over the country's petroleum wealth.
Mood remains dark in Crimea as Russians enter base
Russian and Ukranian officials are trying to form a contact group to diffuse the crisis in Crimea, but tensions there remain high as a convoy of hundreds of Russian troops enter a base in the provincial capital.
Following the alleged bust-up between Chris Brown and Drake's entourages, here's a look at a few other famous celeb rivalries! Mariah and Eminem, Kim Kardashian and Jon Hamm, Jen Aniston and Angelina Jolie, Jon Stewart and Glenn Beck.