Can you figure out this week's Secret Theme rounds? Hush up!

Each group of 10 otherwise unrelated questions has a theme running through their answers. Can you answer the questions and figure out the theme? Answers will be posted in a few days.

Ray's Happy Birthday Bar:

1) What comedian was born John Elroy Sanford in 1922?
2) What annual national competition has been sponsored by Scripps Newspapers since 1941?
3) According to the Bible/Torah, who was Moses' nabi, or spokesman?
4) What American singer-songwriter, who has sold over 12 million albums, uses her birth surname but an adopted first name, her actual first and middle names being Myra Ellen?
5) What American country singer has sold several million albums since 2001 via an exclusive distribution deal with Wal-Mart?
6) What early 20th century British tennis player's clothing line has supplied skinheads with their shirt of choice for decades?
7) At 161 miles, what is the longest river in Ireland?
8) What '90s sitcom took place at radio station WZUP in Detroit?
9) Who has hosted TV's America's Most Wanted since 1988?
10) By what name did we know the American opera singer born Belle Miriam Silverman?

... and what theme links the 10 answers?
Dirty Frank's:

1) What 1970 box office bomb by Michelangelo Antonioni depicted the American countercultural scene with a cast of unknown actors?
2) Depending on who you ask, what mid-'60s item was first designed by either Mary Quant or André Courrèges?
3) In what 1998 movie did Kris Kristofferson play Abraham Whistler?
4) In Ernest Hemingway's The Old Man and the Sea, what injury did the old fisherman have faith Joe DiMaggio could play through?
5) In which Washington DC neighborhood will you find George Washington University and the Watergate complex?
6) What American painter, known for his giant photorealist portraits, continued painting following a stroke?
7) What 1992 song by Wreckx N Effect was kept out of the #1 position on the US pop charts by Whitney Houston's "I Will Always Love You"?
8) What British satirical magazine has been published every two weeks since 1961?
9) What oil giant was founded in 1907 by the merger of a Dutch and a British oil company?
10) What building at Wright-Patterson Air Force Base in Ohio is said to contain the wreckage of the 1947 Roswell UFO crash? The building's name is also the title of a 1990 song by Megadeth and a 1980 UFO conspiracy movie.