It's bad enough bumping into someone you don't want to see on the street, but what about slamming into an ex and his or her new, inevitably beautiful partner on the red carpet?
The celebs below all know the full-body cringe that comes from such unfortunate encounters, but which will give you the most intense second-hand shame?
1. Jennifer Aniston & Angelina Jolie
Where Did It Happen? Critics' Choice Awards 2015
What Went Down? Angelina Jolie and Jennifer Aniston appeared on the same red carpet just minutes after each other and were seated just two tables away. I'm sure that was a lovely relaxing round of drinks with the cold, hard glare of scorn stabbing you in the back. Lovely stuff!
Why So Awkward? If you need this explained, you probably shouldn't be reading this article!
2. Giuliana Rancic & Zendaya
Where Did It Happen? AMAs 2015
What Went Down? Rancic stood just feet away as her colleague, Terrence Jenkins, interviewed Zendaya shortly after her controversial comments about the former-Disney-star's hair style.
Why So Awkward? Giuliana Rancic joked on Fashion Police that Zendaya's dreads looked like they smelled of weed and was slammed by the star for being racist toward a traditionally black hair-do.
Zendaya wrote a public statement condemning Rancic, which read:
To say that an 18-year-old young woman with locs must smell of patchouli oil or 'weed' is not only a large stereotype but outrageously offensive. I don't usually feel the need to respond to negative things but certain remarks cannot go unchecked… there is already harsh criticism of African American hair in society without the help of ignorant people who choose to judge others based on the curl of their hair.
3. Harry Styles & Gigi Hadid
Where Did It Happen? AMAs 2016
What Went Down? Gigi was introduced to the One Direction crew by Giuliana Rancic and Harry threw some serious shade at the 20-year-old model by rolling his eyes at her after she not-so-subtley refused to hug him. COLD.
Why So Awkward? Gigi is BFFs with Harry Styles's ex, Taylor Swift.
4. Robert Pattinson & Liberty Ross
Where Did It Happen? Coachella 2014
What Went Down? Rob and Liberty were at the same H&M private party and locked eyes before awkwardly avoiding each other. According to a source, the pair:
"didn't speak to each other, but both definitely saw each other."
They added that the encounter was:
Why So Awkward? Robert Pattinson's ex-girlfriend, Kristen Stewart, and Liberty Ross's ex-husband, Rupert Sanders, had an affair. Ouch.
5. Jennifer Lawrence & Natalie Dormer
Where Did It Happen? The Mockingjay Part II premiere
What Went Down? Jennifer Lawrence went in to kiss her co-star on the cheek, but she totally Jennifer Lawrenced it and fell onto Dormer's lips instead.
Why So Awkward? Would you want to accidentally and messily kiss your friend on camera for the world to see? I thought not.
6. John Travolta & Scarlett Johansson
Where Did It Happen? Oscars 2015
What Went Down? Some incredibly awkward images surfaced of John Travolta planting one on a rigid and terrified looking ScarJo.
Why So Awkward? The butt-clenching pictorial remnants of this encounter will live on forever. Although Johansson jumped to Travolta's defense and said their embrace was nowhere near as sleazy as it seems. The Avengers actor spoke out to say:
"The image that is circulating is an unfortunate still-frame from a live-action encounter that was very sweet and totally welcome. That still photo does not reflect what preceded and followed if you see the moment live. There is nothing strange, creepy or inappropriate about John Travolta."
Despite her kind words, the image became one of the most circulated of the ceremony and continued to make cringe wherever it went.