The identity of Rachels babys father kept herFriendsguessing for a while who did the red sweater belong to?!
and before that, there was even some confusion about who took that pregnancy test.
Both situations, of course, got solved.

Credit: Warner Bros. Television/Getty Images
We even learnedthe identity of Ugly Naked Guyearlier this year.
But theres a new mystery brewing at Central Perk in the form of the blonde in the purple blouse.
Comedian Nick Turner noticed said extra just over the shoulder of Ross (David Schwimmer) while watchingFriends.
He saw that after taking a drink from a mug, this mystery woman began a chewing motion.
And the award for best Friends extra goes to woman who sips coffee then chews it, Turner writes.
No plate appears in front of the actress, so washing down a foodstuff seems unlikely.
Another use proposed the glass was filled with hot chocolate con marshmallows plausible, in Turners estimation.
However, the drink seems dramatic, as if nothingtrulyfills it.
Our best idea is its empty, and she was working on a stick of gum.
Any working theories will be accepted.