Donna Summer's family statement about her death didn't mention cause of death. The Associated Press cited her publicist as saying it was cancer. Several reports note that Summer battled breast cancer years ago. And TMZ reports that lung cancer is what ultimately killed her.

Summer was a smoker and, as a singer, spent years in clubs where smoking was allowed, TMZ reports. But that's not what she thought did it.

The disco queen felt that inhaling toxic air after 9/11 gave her lung cancer.

Sources close to the singer tell TMZ that Summer was in New York City during 9/11, living at an apartment near Ground Zero. The site says she "became almost paranoid about breathing the air, which was heavy with a rancid odor."

Deney Terrio, the host of "Dance Fever," told TMZ that Summer would hang silk sheets in her dressing room to prevent dust from coming in.

Thousands of Ground Zero workers were reported to have lung ailments following the 9/11 attacks.

McCarthy to pose nude

Jenny McCarthy launched her career when she was 20 by taking her clothes off for Playboy in 1993. She went on to become Playmate of the Year.

Now, the 39-year-old host of NBC's "Love in the Wild," which conveniently debuts June 5, plans to bare all again for a nude pictorial in the July-August issue. Look for it to hit newsstands June 29, E! reports.

"All I wanted to do (when she began in the industry) was work with my clothes on, and now I just hope to get them off!" she said this week at the E! upfronts.

Al Gore has a girlfriend

It's been nearly two years since Al and Tipper Gore announced they were separating after 40 years of marriage.

Cut to now and a hot-couple alert: Former VP Gore, 64, has a "serious girlfriend," reports the Washington Post.

Her name is Elizabeth Keadle, whom the Post describes as "a well-heeled Democratic donor from Southern California in her 50s with a background in science and a devotion to environmental causes."

The two have apparently done some rubbing of shoulders with stars. They joined experts and such stars as Richard Branson, Jason Mraz and Tommy Lee Jones on a trip to Antarctica in January to raise awareness of climate change.

Gore's office declined to comment on the relationship to the Post, as did Keadle.