That Ashlee Simpson is a cheeky one isn't she? On last night's US chat show Ellen - the singer refused to deny or 'fess up about the pregnancy rumours that are flying around.

After Ash and  Pete Wentz announced their engagement earlier this month  sources immediately alleged the singer is expecting the couple's first child.

The pair have since made numerous TV appearances and failed to clear up the rumours - even spoofing them by making a video showing Ash wearing a fake baby bump.

And the 23-year-old singer remained coy about the subject when she was quizzed about the baby rumours during her appearance on The Ellen DeGeneres Show.

When asked directly by host Ellen, "Are you or are you not pregnant?" Simpson responded by saying, "Well, that has been going on for quite a while. That is something that I choose personally not to discuss."

Ellen then made her promise she would not keep the public guessing for as long as fellow singer Jennifer Lopez - who waited until her swollen belly was so obvious, no one was surprised when she finally confirmed the baby news.

Ash then said "I swear. I promise you that. I give you my pinky (little finger) on that."

She also dodged one final attempt to catch her out. When asked, "Is it a boy or a girl?" Ash laughed and responded, "You're funny."

Watch the hilarious video on youtube. Isn't great that they don't take themselves too seriously!

The mystery continues...

What do you think?