Brooks, Gershwin Concerts and Elvis at the White House

Two new music specials light up this weekend’s television fare.

HBO presents “Garth Live From Central Park” at 8 tonight. Garth Brooks, the biggest-selling solo recording artist in the United States, will be singing his greatest hits in this free concert in New York’s Central Park.

If show tunes are more your cup of tea, check out A&E;’s “The Ira Gershwin Centenary Concert,” Saturday at 7 and 11 p.m. Liza Minnelli, Tony Bennett, Petula Clark and Maureen McGovern are among the performers in the two-hour tribute to the lyricist--and older brother of composer George Gershwin--that was taped at London’s Royal Albert Hall. Among the Gershwin standards featured are “I Got Rhythm,” “The Man I Love” and “Embraceable You.”

Other programming:

Today

Karyn Bryant hosts TNT’s “Rough Cut” at 7:30 and 10:30 p.m. The new weekly series covers the latest Hollywood movies, technology and box-office performance. Juliette Hohnen, Charles Fleming and Tom Brown are the correspondents.

“Charles Rennie Mackintosh: A Modern Man,” at 10 p.m. on KCET-TV Channel 28, looks at the work of the famed Scottish architect.

Saturday

CBS kicks off its new three-part series, “Crayola Kids Adventures,” at 9 a.m. on Channel 2, with “The Trojan Horse.” Adam Wylie stars in this adaptation of the Greek myth as the 11-year-old Odysseus.

Henry Thomas and Frank Whaley star in the Sci-Fi Channel thriller “Bombshell” at 6 and 10:30 p.m.

Steve Edwards, Jillian Barberie and Dorothy Lucey host “When Anchors Attack: World’s Scariest ‘Good Day L.A.’ Moments,” at 7 p.m. on Channel 11. The special celebrates the fourth anniversary of the KTTV-TV morning show.

Sunday

E! Entertainment Television presents “Grace, Caroline, Stephanie: The Curse of the Royal Family” at 5 p.m. The special chronicles the triumphs and tragedies of the Royal Family of Monaco.

The Learning Channel’s “Rituals of the World: Rites of Pain,” at 7 and 10 p.m., looks at three stories that document a ritual for which pain is considered a measure of spiritual conviction.

In TBS’ “Wild!Life Adventures” special “Diving With Great Whales,” at 6 p.m., filmmaker Mitsuaki Iwago chronicles the behavior of one of the most intelligent of the whale species--the humpback whale.

Hal Holbrook narrates PBS’ “Trail of Hope: The Story of the Mormon Trail” at 9 p.m. on Channel 28. The two-hour documentary chronicles the history of the group of Americans who won out over hardships to find religious freedom. The special commemorates the 150th anniversary of the first arrival of emigrants at Utah’s Great Basin.

Rick Peters and Bob Gunton star in Showtime’s latest movie, “Elvis Meets Nixon,” at 9 p.m. The film recounts the time in 1970 when Elvis Presley went out alone in public for the first time, flying from Memphis to Washington to Los Angeles and then back to Washington and ended up meeting President Nixon.