The invisible war of words between John Mayer and Taylor Swift goes on.

Mayer went on "Today" Friday to promote his new album "Paradise Valley," and was asked whether the single "Paper Doll" was aimed at Swift, whom he dated for a short stretch in 2009. Swift, of course, famously portrayed Mayer as a heartless Casanova (without naming him) in her song "Dear John."

So is "Paper Doll" Mayer's revenge?

"Songwriters write songs because of people, about people," he said. "Anything someone else wrote is their reception of a song. I don't get involved in it. It's none of my business."

To summarize: Someone asked Mayer what his own song is about and he answered, "It's none of my business."

Whoa, that's deep.

The song's chorus sure seems to about Swift, however:

"You're like 22 girls in one/And none of them know what they're running from/Was it just too far to fall/for a little paper doll?"

Mayer plays Shoreline Amphitheatre on July 26.

JULY 6 IN HISTORY

Saturday is July 6, the 187th day of 2013. There are 178 days left in the year.

1483: England's King Richard III was crowned in Westminster Abbey.

1535: Sir Thomas More was executed in England for high treason.

1777: During the American Revolution, British forces captured Fort Ticonderoga.

1885: French scientist Louis Pasteur tested an anti-rabies vaccine on 9-year-old Joseph Meister, who had been bitten by an infected dog; the boy did not develop rabies.

1917: During World War I, Arab forces led by T.E. Lawrence and Auda Abu Tayi captured the port of Aqaba (AH'-kah-buh) from the Turks.

1933: The first All-Star baseball game was played at Chicago's Comiskey Park; the American League defeated the National League, 4-2.

1944: An estimated 168 people died in a fire that broke out during a performance in the main tent of the Ringling Bros. and Barnum & Bailey Circus in Hartford, Conn.

1945: President Harry S. Truman signed an executive order establishing the Medal of Freedom.

1957: Althea Gibson became the first black tennis player to win a Wimbledon singles title as she defeated fellow American Darlene Hard 6-3, 6-2.

1963: The cult horror movie "Blood Feast" had its world premiere at a drive-in theater in Peoria, Ill.

1973: Classical conductor Otto Klemperer, 88, died in Zurich, Switzerland.

1983: Fred Lynn of the California Angels hit the first (and, to date, only) grand slam in an All-Star game as the American League zoomed to a 13-3 victory over the National League in Chicago's Comiskey Park.

1988: 167 North Sea oil workers were killed when explosions and fires destroyed a drilling platform. Medical waste and other debris began washing up on New York City-area seashores, forcing the closing of several popular beaches.

2003: Liberian leader Charles Taylor accepted an offer of asylum in Nigeria (he resigned and flew into exile the following month). Roger Federer became the first Swiss man to win a Grand Slam title, defeating Mark Philippoussis 7-6 (5), 6-2, 7-6 (3) in the Wimbledon final. Actor Buddy Ebsen died in Torrance, Calif., at age 95.

2008: The U.S. launched an airstrike in Afghanistan's Nuristan province; the Afghan government later said 47 civilians died. President George W. Bush arrived in Japan for his eighth and final Group of Eight summit, where he emphasized the urgency of providing aid to Africa. Rafael Nadal won a riveting five-set Wimbledon final, 6-4, 6-4, 6-7 (5), 6-7 (8), 9-7, denying Roger Federer a sixth straight title in a match that lasted 4 hours, 48 minutes.

2012: At a 100-nation conference in Paris, U.S. Secretary of State Hillary Rodham Clinton hailed an accelerating wave of defections in President Bashar Assad's inner circle as the United States and its international allies pleaded once again for global sanctions against the Syrian regime. Former neighborhood watch volunteer George Zimmerman was released from jail in Florida for a second time while he awaited his second-degree murder trial for fatally shooting Trayvon Martin.

BIRTHDAYS

Former first lady Nancy Reagan (92), actor William Schallert (91), singer-actress Della Reese (82), the 14th Dalai Lama, Tenzin Gyatso (78), actor Ned Beatty (76), singer Gene Chandler (73), country singer Jeannie Seely (73), actor Burt Ward (68), former President George W. Bush (67), actor-director Sylvester Stallone (67), actor Fred Dryer (67), actress Shelley Hack (66), actress Nathalie Baye (65), actor Geoffrey Rush (62), actress Allyce Beasley (62), rock musician John Bazz of the Blasters (61), actor Grant Goodeve (61), country singer Nanci Griffith (60), jazz musician Rick Braun (58), country musician John Jorgenson (57), former first daughter Susan Ford Bales (56), hockey player and coach Ron Duguay (56), actress-writer Jennifer Saunders (55), rock musician John Keeble of Spandau Ballet (54), actor Brian Posehn (47), actor Brian Van Holt (44), rapper Inspectah Deck of Wu-Tang Clan (43), TV host Josh Elliott (42), rapper 50 Cent (38), actress Tia Mowry (35), actress Tamera Mowry (35), actress Eva Green (33), actor Gregory Smith (30), rock singer Kate Nash (26), actor Jeremy Suarez (23).