He wrote, directed and starred in red-hot “Zoolander,” but Ben Stiller STILL found time to produce a birthday gift that melted co-star/wife Christine Taylor — a spoof movie starring her beloved pooch Kahlua! But Ben had to get SNEAKY! Homebody Christine rarely goes out, so family members, friends and neighbors secretly paged him on the set whenever she left the house! Then Ben and a crew would rush over, put costumes on Christine’s lovable Labrador (who has a bit part in “Zoolander”) and crank away! It took months, but when Ben proudly screened his flick starring wifey’s pet as a “Terminator”-style superdog, Christine and Kahlua were BOTH wagging their tails!