Hollywood Exclusive by Marilyn Beck & Stacy Jenel Smith

DEAR STACY: David Cassidy was on "Celebrity Apprentice." Davy Jones was on a reunion tour with The Monkees. But whatever happened to my other favorite teen idol of the '60s, Bobby Sherman? — Janice F., Spokane, Wash.

DEAR JANICE: Now 68 years old, the one-time "Here Come the Brides" heartthrob, who had seven top-40 hits during his singing career, is retired from the entertainment business and public life.

He continued to act on shows such as "Murder, She Wrote" and "Frasier" — and went out with Peter Noone and Davy Jones as part of the Teen Idol Tour of 1998 — but left show business after doing his last concert as a solo performer in 2001.

Meanwhile, Sherman had developed a whole other professional life, becoming a trained emergency medical technician (EMT) in 1988. He went on to work for the Los Angeles Police Department as a specialist reserve officer, training police cadets in CPR and first aid — work he loved and for which he was eventually promoted to Captain. In 1999, he became a reserve San Bernardino County Sheriff, also in a medical training capacity.

He founded the Bobby Sherman Volunteer EMT Foundation, which supplies medical services to community events.

Sherman, who married twice, has grown twin sons from his first marriage and is the grandfather of five. Another claim to fame: he built a one-fifth-scale model of Disneyland's Main Street entirely by hand in his yard.

DEAR STACY: Who is the most successful of the "So You Think You Can

Dance" alumni and what is he or she up to? — Pat W., Santa Monica, Calif.

DEAR PAT: Several of the dancers who've won accolades and fans on the Fox dance competition show have gone on to interesting work — but it's easy to make the case for Lacey Schwimmer of season 3 as the most successful.

She became a regular on ABC's "Dancing with the Stars," appeared in Adam Sandler's "Bedtime Stories" and danced alongside Sandler at the MTV Movie Awards.

She also has a recording career, but that's another story.

DEAR STACY: Whatever became of Anson Williams, who played Potsie on "Happy Days"? — H.G., Allentown, Pa.

DEAR H.G.: Williams turned from actor to director in the mid-1980s and has helmed numerous shows, including "Charmed," "Lizzie McGuire," "7th Heaven" and "Baywatch."

DEAR STACY: I was surprised to hear that Seth MacFarlane is involved in a new version of Carl Sagan's classic "Cosmos" series. Isn't that way out of his field? Am I missing a joke? — Greg S., Canton, Ohio

DEAR GREG: No joke. The animator, voice actor, comedian, singer, actor, producer and director known for bringing us "Family Guy," "American Dad" and "The Cleveland Show," doesn't think so. (That's despite the fact that his other big project for Fox is a reboot of "The Flintstones.")

He released a statement expressing his view on the project: "Never more than at this moment in the modern era have we needed a profound reminder of the colossally important and exciting role that science, space exploration and the human quest for knowledge must continue to play in our development as a species."

Astrophysicist Neil deGrasse Tyson is aboard the project as host of the new "Cosmos," which is expected to land in a couple of years. Fox and the National Geographic Channel are coproducing.