Not every one of these Mother's Day celebrants is really a mom -- but they play one on TV.

On-screen children honored their television mothers at "A Mother's Day Salute to TV Moms," an event put on by the Academy of Television Arts and Sciences.

Attendees included Marion Ross ("Happy Days") and her TV offspring Erin Moran; Diahann Carroll ("Julia," "Dynasty" and "A Different World") and "World" co-star Jasmine Guy; Bonnie Franklin ("One Day at a Time") and Mackenzie Phillips and Valerie Bertinelli; and Holland Taylor ("Two and a Half Men") with Jon Cryer and Charlie Sheen.

Questions arose at the Tuesday night event about another show-biz mother, Britney Spears, who had scored greater access to her two sons in a custody proceeding earlier in the day.

"You know, I always say, 'If the camera followed you all of your life, we would think differently about you, as well,'" said Tichina Arnold, who plays the mom on the sitcom "Everybody Hates Chris." "There are certain things that we don't need to see or know. But Britney's always in our prayers -- that she will be a productive mother."

Productive, like TV moms such as Ross' Marion Cunningham, Carroll's Julia Baker and Franklin's Ann Romano, whose go-it-alone character on "One Day at a Time" made for groundbreaking TV.

"She was the first one, who, on television -- since then, I mean, it's all over the place -- a single mother raising two kids," Franklin said. "And it was reflective of what was happening in the country."

As in reality, not all TV moms are good ones, especially Taylor's bawdy Evelyn Harper on "Two and a Half Men."

"I think that's pretty accurate," Taylor replied. "I mean, if you think 'Antichrist'/'Anti-mom.' I think what has trained me and prepared me for this role, as this particular mother, is that I have never had children. And not only have I never had children, but I didn't even notice that I haven't had children. So, with that in mind, I am beautifully equipped to play Evelyn Harper."

(Michael Cidoni, Associated Press)

ABC News is going back to school.

The network announced Wednesday that it will be opening five college campus bureaus in September at journalism schools around the country.

The multimedia bureaus will be staffed by undergraduate and graduate journalism students who will report stories for the news division's online offerings, as well as its broadcast news programs.

The bureaus will be at Arizona State University; Syracuse University; University of Florida, Gainesville; University of North Carolina, Chapel Hill; and University of Texas, Austin.

(Los Angeles Times)

Cablevision Systems Corp. is buying the Sundance Channel, a cable network founded by Robert Redford, for $496 million, the New York-area cable TV company announced Wednesday.

The Sundance Channel will become part of Cablevision's Rainbow Media programming division but will continue on as a distinct network. Rainbow also includes the independent movie channel IFC, AMC and WE tv.

The network was founded in 1996 by actor-director Redford as an outgrowth of his Sundance Institute, an independent film organization that runs an annual film festival near Park City, Utah.

The channel features independent movies and original programming, some of which reflects Redford's concerns about the environment and progressive issues.

(Seth Sutel, Associated Press)