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Ellen DeGeneres looks very different in this throwback pic

The beloved talk show host's teenage throwback photo tells us something we never knew about her.
/ Source: TODAY

Ellen DeGeneres is feelin' 15! Mostly, it's because she's about to start the 15th season of "The Ellen DeGeneres Show."

But in honor of that, she decided to share a particularly revealing photo of herself on Instagram ... from when she was 15.

Behold, Ms. DeGeneres, at that awkward, curly-haired teenage stage:

The expression on her face is priceless. It's got just enough of the classic teen "why are you bothering to take my picture" expression, paired with the still-in-progress growing adult DeGeneres would become. You know, the one with the short, straight blonde hair.

Ellen DeGeneres, today.EllenTube

We never knew!

But DeGeneres likes to get the crowd involved, so she's asked in the Instagram caption for her fans to send pictures of themselves when they were 15. One celebrity (that we've seen) has already jumped in:

And what's amusing us the most is just how many viewers feel that at 15 they were DeGeneres' doppleganger!

We can't wait to see what the next few days will reveal. And as DeGeneres' photo proves, as teenagers we are amazing all grown-ups in the making!

"The Ellen DeGeneres Show" returns on September 5.

Follow Randee Dawn on Twitter.