We’re Breaking Down Fact From Fiction in Tabloid News (VIDEO)

It’s that time of the week again, when the celebrity weeklies hit the newsstands. To separate what’s real and rumor, we turned to our friends at Gossip Cop for the 411 on this week’s most controversial stories.

Check out what we’ve learned about Robert Pattinson and Kristen Stewart, Kim Kardashian and Kanye West, Justin Bieber and more of your favorite stars — after the jump.

Kristen Stewart is again tempted to cheat on Robert Pattinson with Rupert Sanders while her boyfriend’s away in Australia, reveals In Touch. The magazine says Stewart is “lonely and vulnerable right now,” and it’s likely — with Pattinson abroad — that she and Sanders will get “back in touch.” For whether Stewart and Sanders are already in contact, click over to Gossip Cop.

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Justin Bieber had an “affair with Rihanna” while he was dating Selena Gomez, reveals Life & Style. The mag says the bombshell was “devastating” for Gomez, who dumped Bieber as soon as she found out about his cheating. For the shocking details on what went down between Bieber and Rihanna, click over to Gossip Cop.

Kim Kardashian and Kanye West are having “trouble in paradise,” reports Star, which says the reality star has said “no way” to taking the rapper’s last name once they marry. And what’s more, says the mag, is that she wants their baby “to have her name too!” For whether the couple is in danger of splitting due to the name squabble, head over to Gossip Cop.