Brad Pitt fights the zombies in new movie

A smiling Brad Pitt waved to fans in the Scottish city of Glasgow as he left the set of his latest movie "World War Z."

The actor was in town this week to shoot the zombie horror movie, which is based on a book by Max Brooks.

Paramount film studio has made every effort to keep the movie under wraps. The set is closed to all media and no production details have been released.

The center of Glasgow has been transformed to depict Philadelphia in the aftermath of a war between humans and zombies. Shooting is expected to last two weeks.

The Glasgow Film Office says the movie involves almost 1,200 people and will pour over $3.3 million into the local economy.

Martina's helping out

Martina McBride's new single, "I'm Gonna Love You Through It," is an inspirational song about going through cancer, and for the video, she enlisted the help of a few famous faces to convey the message.

"Good Morning America" anchor Robin Roberts, singer Sheryl Crow, ABC's Katie Couric and "Today" anchor Hoda Kotb all appear in the clip on CMT.com.

Roberts, Crow and Kotb are all survivors of breast cancer; Couric's husband died of colon cancer.

McBride, who has never had cancer, says she wanted to sing the song to give hope and positive messages to those going through the struggle.

She says it "takes a lot of strength and a lot of love to get through something like that."

The song is from her new album, "Eleven," due out Oct. 11.

No one-hit wonder

When Katy Perry first came on the scene, some dismissed her as a one-hit wonder. Three years later, she's proven she's a multi-hit wonder, becoming the first woman to score five No. 1 songs from one album on the Billboard Hot 100 chart.

Her "Last Friday Night (T.G.I.F.)" set the precedent: It's the latest No. 1 from her platinum album "Teenage Dream."

Only Michael Jackson had five No. 1s from one album before Perry, from "Bad."

Buying Gere's guitars

Actor Richard Gere has a passion for American vintage guitars.

Christie's auction house in New York says it will be selling 110 of his guitars on Oct. 11.

Gere says he's parting with the instruments to support humanitarian causes around the world.

Christie's says Gere studied trumpet and is a self-taught pianist and guitarist. Gere said in a statement announcing the sale that he never planned to put together a guitar collection and bought only ones he liked and that sounded good to him.

Another year older

Today's birthdays: Actress Debra Paget, 78 . . . actress Diana Muldaur, 73 . . . rock musician Ginger Baker (Cream, Blind Faith), 72 . . . actress Jill St. John, 71 . . . country singer-songwriter Eddy Raven, 67 . . . former President Bill Clinton, 65 . . . Tipper Gore , 63 . . . actor-director Jonathan Frakes, 59 . . . actor Adam Arkin, 55 . . . rhythm-and-blues singer Ivan Neville, 52 . . . actor John Stamos, 48 . . . actress Kyra Sedgwick, 46 . . . country singer Lee Ann Womack, 45 . . . actor Matthew Perry, 42 . . . actress Erika Christensen, 29 . . . pop singer Missy Higgins, 28 . . . country singer Karli Osborn, 27 . . . actor J. Evan Bonifant, 26 . . . rapper Romeo, 22.