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Rupert Sanders, Kristen Stewart, Robert Pattinson

1. Kristen Stewart Cheats – With a Married Man!
While we fully expected there would be bumps in the road for “Twilight” lovebirds Kristen Stewart, 22, and Robert Pattinson, 24 – in addition to being young, the world is watching their every move – we weren’t at all prepared for the 2012 Robsten cheatgate scandal that broke in July. Not only was there photo proof that Stewart strayed with her older, married “Snow White and the Huntsman” director Rupert Sanders (and the pictures were steamy!), but the typically tight-lipped actress quickly issued a public apology confirming her betrayal and groveled for Pattinson’s forgiveness. While the couple initially parted ways – and everyone wondered if Stewart would get visitation privileges with his dog Bear, whom she has referred to as her “child” – their separation didn’t last long. Soon after the news broke that Pattinson moved out of the home they shared, there was talk of their tearful reunion, and secret date nights. By the time the “The Twilight Saga: Breaking Dawn – Part II” premiere rolled around in November, things oddly seemed completely back to normal.

10 Biggest Celebrity Headlines of 2012

From Katie Holmes giving Tom Cruise the kiss off to Kristen Stewart straying from RPattz, these stories had omg! readers (and editors!) buzzing this year.