LOS ANGELES (AP) — Zoo animals remain hot at the box office. Singing stars and Adam Sandler are not.

Ben Stiller and his voice co-stars of Madagascar 3: Europe’s Most Wanted held on to the No 1 spot again, with US$35.5 million for the animated sequel’s second weekend in domestic theaters.

Studio estimates yesterday put Ridley Scott’s sci-fi adventure Prometheus at No 2 again with US$20.2 million.

Madagascar 3 and Prometheus held off two under-achieving newcomers. The star-studded musical Rock of Ages, whose cast includes Tom Cruise, Catherine Zeta-Jones and Alec Baldwin, flopped at No. 3 with US$15.1 million.

Sandler’s That’s My Boy bombed with US$13 million, the worst showing for one of his broad comedies since the mid-1990s. That’s My Boy came in at No. 5, behind the US$13.8 million for Snow White & the Huntsman, a film that’s been out for three weekends already.

“Sure, we would have liked to have done more,” said Rory Bruer, head of distribution at Sony, which released “That’s My Boy” and most of Sandler’s past movies. “But you’ve got to give it to Adam. He mixes it up. This is a really off-the-wall comedy.”

That’s My Boy stars Sandler as a guy who became a fleeting teen celebrity after getting his seventh-grade teacher pregnant and now is a middle-aged loser trying to reconnect with his son (Andy Samberg).

As with most Sandler movies, the reviews were bad, but that usually does not stop his audience of young males from showing up.

The R rating for That’s My Boy may have cut into the movie’s business, prohibiting those under 17 from seeing it without an adult. Sandler’s comedies usually are rated PG-13.