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On the same day that Jennifer Lopez managed to avoid the big pregnancy question from Diane Sawyer on Good Morning America, the singer faced another tough interviewer – David Letterman.

But the host, who relentlessly peppered Paris Hilton with questions about her jail stay recently, kept mum when it came to asking Lopez about a possible visit from the stork.

As witnessed during Tuesday’s late afternoon taping of CBS’s Late Show with David Letterman, the TV host did ask Lopez, 38, about her mother Guadalupe – who parented with tough love, her famous daughter explained.

Though clearly respecting Lopez and husband Marc Anthony’s privacy, Letterman, 60, nevertheless asked if J.Lo would be as tough a parent as her own mom if she ever started a family.

As a father himself – of son Harry, who turns 4 next month – Letterman acknowledged that parenting is challenging, which prompted Lopez to smirk.