The biggest plot hole is that Charlotte did not turn into a frog when she kissed Naveen. She kissed him after midnight (no longer a Princess) meaning she was supposed to turn into a frog like Tiana did. Plus, Charlotte kissed him multiple times.

There are other smaller plot holes like how nobody seemed to miss Tiana while she was gone but they don't really bother me.

I love this movie, but unfortunately there are plenty.

- Tiana is turns into a frog and missing for two days but no one notices or wonders where she is?

- Louis meets Tiana and Naveen early in the morning, agrees to take them to Mama Odie, then they swim all day and don't encounter Ray till night. By that point he tells them they're going in the wrong direction and takes them the right way. Despite losing a whole day under Louis' guidance, they make it to Mama Odie's within a few hours--and this includes a few-hour break after the hunters and their stop for dinner.

- Tiana knows there's a fake Naveen trying to woo Lottie since Naveen got her up to speed while they were floating along in the balloons, and Mama Odie said they would both turn human after he kissed Lottie, so why does she believe Naveen turned back without her? Even Ray says: "This can't be right, how can still be a frog?" I guess we're supposed to believe she's not thinking straight because she's upset, but even that ruins suspension of disbelief.

- While not a plot hole per se, the Finner Brothers refuse to give Tiana the sugar mill because she was "outbid." I kept waiting for this mystery bidder to be important to the plot (maybe it was Facilier wanting a new base of operations or something), but it never came up again.

If I rag on it anymore, people will think I dislike this movie, so I'll stop.

What's said above and I don't remember exact words but I think Mr Facilier said that Naveen would be frog as long as they'll keep his blood in the talisman, but Naveen didn't turn back to human when blood went off. Maybe Facilier didn't know how the spell worked exactly :/

What dimitri_ and Tygers said.

I've wondered why others didn't worry about Tiana's disappearance and why she was upset to see "Naveen" marrying Charlotte, like Tygers_Eye said, but I guess those aren't really big plot holes. I think Dr. Facilier said that as long as they had Naveen's blood, then Lawrence would appear to be Naveen, but the real Naveen would still be a frog. That explains why Naveen stayed a frog when the talisman first ran out (as Lawrence proposed to Charlotte). Only a kiss from a princess could break the spell.

What I couldn't figure out is what happened to the other bidder after Louis intimidated the Fenners into giving the sugar mill to Tiana. Maybe they were lying about the other bidder to prevent Tiana from getting it.

Nobody notices that Tiana was missing, Charlotte didn't turn into a frog when she kissed Naveen, and Tiana not remembering that there is a fake Naveen because she's still a frog. I'm aware of it's plotholes but I LOVE this movie to death!

1. Tiana was a little to self reliant to pity
2. The Subplot is more interesting than the main plot (that's saying something)