Former Danity Kane singer Aubrey O’Day may have accidentally (or purposely) made it known that she suffers with mental health issues.

The “Celebrity Apprentice” star recently took a first class Virgin Atlantic flight to San Francisco and was accompanied by her 2 pet dogs. She even tweeted a picture of them all on the plane!

But TMZ questioned a Virgin Atlantic representative and found that the former “Making the Band” star was cleared to bring her 2 pets into the 1st class section of a flight this week … because they are registered as “Emotional Support Animals.”

And what exactly is an “Emotional Support Animal,” you ask? … An animal that provides emotional support, duh!

Now, the question should be “how on earth does a person get clearance to bring an ‘emotional support animal’ on an airplane?”

As TMZ put it:

Ya gotta have a doctor write a letter … stating you have mental issues.

According to the Virgin America website, the airline requires the passenger to produce a letter from a licensed mental health professional which substantiates the guest’s disability-related need for the animal to accompany them in the aircraft cabin.

V.A. claims the letter must state that the passenger “has a mental health-related disability” … and that having the animal accompany the passenger is necessary for his or her mental health.

Aubrey’s reps were contacted for comment, but didn’t respond … however a rep for Virgin said that O’Day was “incredibly sweet and polite” and a “great guest.”

What type of “mental condition” do you think Aubrey O’Day suffers from?