IN PHOTOS: Dennis, Tom, Alden, Aljur sizzle at Cosmo Bachelor Bash 2013

MANILA, Philippines – It was indeed a night of good boys going bad at the Cosmo Bachelor Bash 2013 at the World Trade Center in Pasay City on Tuesday, Sept. 24.

The 10 centerfolds and the 69 hunks of the Cosmo Men supplement of the September issue of Cosmopolitan Magazine unleashed their wild side during the annual event.

For stars like Alden Richards and Sam Concepcion, it was a time to trade their usual wholesome issue for a more daring one — even just for one night.

The Kapuso young actor walked the runway wearing a lab coat, in line with the “naughty school boys” theme of the night. But near the end of the runway, ladies came up the stage and removed his clothing, revealing Alden to be wearing only flimsy black boxers underneath.

Aljur Abrenica also showed off his physique as he sang Robin Thicke’s “Blurred Lines” while wearing only white boxers. He

“I didn't know Aljur could Sing. To be fair.. getting topless while singing Blurred Lines? Worked flawlessly,” said one Instagram user on Aljur’s performance.

“My Husband’s Lover” lead stars Tom Rodriguez and Dennis Trillo were also crowd favorites. Their co-stars Pancho Magno, Victor Basa and Rodjun Cruz also walked the runway.

Centerfolds who showed off their bodies during the annual event include JC De Vera, Matteo Guidicelli, models Vince Ferraren and Sam Adjhani. Daniel Matsunaga, Albie Casino, JayR, among others, also walked the runway. – Eunice Blanco and Chuck Smith

Here are other photos from the Cosmo Bachelor Bash 2013 (photos by Eunice Blanco):