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Joe Nichols admits he's "outnumbered."  The country star tells People he and his wife, Heather, are having another girl! The newest Nichols will be the second child for the couple, and Joe's third daughter. 

The singer says with girls he's done things he couldn't have imagined as a single man.  He explains that they just celebrated daughter Dylan's birthday a couple of weeks ago with "a princess party." 

Joe says he "never expected to wear a tiara" but did when "the two-year-old birthday girl says, 'Wear this, Daddy.'"  He adds that he can't fulfill all of Dylan's requests.  He says the toddler knows there'll soon be a new family member, but a sister isn't what she has in mind.  Joe explains that Dylan "points to Heather's belly and says, 'Puppy!'" 

The baby's due on May 20th and Joe plans to be there, saying he "wouldn't miss that for anything."  He doesn't say, however, if they'll also be welcoming a dog into their family anytime soon. 

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