Temper Tantrums, already???

Literally, on Flynne's 1st Birthday, I witnessed her first temper tantrum. Holy moly! I was kind of in awe and couldn't really believe it was happening. What was wrong with her. She enjoys playing with our phones and watching "Gigglebellies" on YouTube. I had a video "If You're Happy & You Know It" on the phone (how ironic!) and once it ended she was so mad. Threw the phone down, and then proceeded to throw her body against the floor and kick her legs. Flynne isn't around other kids much, which leads me to this question... Where in the world did she learn this? I really didn't know how to respond, but I do know that everything I did only made her more mad! Both my husband and I are hoping this isn't the beginning of the terrible twos, since she is JUST one! I'm continually reminded by many, that OUR sweet daughter may have a little bit of her momma in her! Good for her! She's blessed! :)