Hold the rice! Hot on the heels of a report that Don Johnson's wandering eye has been acting up comes word that Barbra Streisand is planning a trip to the U.S.S.R. with a former beau, ex-Prime Minister of Canada Pierre Trudeau. Joining them will be Cis Corman, Babs's longtime friend and production company head, and Corman's husband, Dr. Harvey Corman (no relation to the comedian). Guess Pierre's still lucky.

Calvin Klein's name, so familiar from the tags on his elegant clothing designs, is now on the guest register at the Hazelden Foundation in Center City, Minn., the $5,500-a-month rehab facility where Sharon (Cagney & Lacey) Gless has also been a patient. Klein went to Hazelden earlier this month to get treatment for alcohol and prescription drug abuse. He had recently been observed at a Manhattan charity party downing more than sociable amounts of vodka. According to a spokesman, wife Kelly "has been a mainstay of support through this."

Whoopi Goldberg and cinematographer David Claessen are due to celebrate their second wedding anniversary Sept. 1. But according to London's Daily Mirror, Whoopi said, "He only married me to further his career as a filmmaker." Right now, Whoopi's busy touring the States with Living on the Edge of Chaos, her new one-woman show. As for the state of her marriage, her publicist says only, "No comment."

Among the more offbeat college commencement speakers this year: Fred Rogers, better known as Mister Rogers, welcomed graduates to the big neighborhood called adulthood at Immaculata College in suburban Philadelphia. K Mart CEO Joseph Antonini addressed Wheeling College in West Virginia. A college spokesman said Antonini was tapped because "he has bettered the lives of low-income people by improving the kinds of goods K Mart offers yet keeping the prices down." And Seton Hill College, a Catholic school in Greensburg, Pa., signed Kate (Heartbeat) Mulgrew because she had played Mother Elizabeth Bayley Seton on TV.

Sally Kellerman recently spent three days watching Boris and Natasha plot to undermine the free world in Rocky and Bullwinkle TV cartoons. "I wanted to get into character," says Kellerman, who will be playing the vampy, husky-voiced Natasha in the film Boris and Natasha, which starts shooting in July. SCTV's Dave Thomas plays Boris and actor Charles Martin (The Untouchables) Smith directs. Rocky and Bullwinkle will be confined to opening-credit cartoon cameos.

Cybill Shepherd spent part of her spring vacation crossing America with her husband, Dr. Bruce Oppenheim, and her three children in a mammoth motor home, which her mother, Patty Micci, describes as being "as big as a Greyhound bus." En route to her hometown of Memphis, the Moonlighting star, daughter Clementine, 8, and twin babies Ariel and Zachariah, stopped at the Grand Canyon and other tourist sights. Also along were Cybill's housekeeper, two nannies and a driver. After Tennessee, the group headed for Washington, D.C., where Shepherd is shooting her new movie, Life After Life. Says her mother: "Cybill said she'll be so busy she won't have time to change a diaper, so they're flying in a third nanny from California to help with the twins."