UPDATE - Miley has replied to the trending topic of her rumored pregnancy and guess what ... she's NOT! And she's not super happy people think she looks fat ...

So close to b-day time! Stoked for a day full of Tofurkey & loved ones! Ain't it ironic? #VeganTurkeyBaby

A post shared by Miley Cyrus (@mileycyrus) on

What's with the bump?!

Miley Cyrus set fans into a tizzy on Turkey Day with this Instagram of her posing in front of balloons that spell out her name. The singer's birthday is the 23rd, so each year she has a double celebration at Thanksgiving. This year Miley turned 25 and it looks like she might be receiving the best gift of all ... a baby!

Fiance Liam Hemsworth's reflection can be seen in the mirror of this pic -- is he happily sharing baby news with their fans? Of course fans have even speculated the couple is already married so really, we know nothing about this private couple!

What we DO know is that Miley has posted other pix recently, in which she doesn't appear to show any signs at all of a baby bump. Check out this pic posted the same day ...

So is she or isn't she? Vote here!