Rihanna and Chris Brown, shown here in 2008, have reunited on two new recordings. (REUTERS/Lucas Jackson)

- The closing ceremonies for this summer’s London Olympics will feature a concert headlined by Blur . Also performing — New Order and the Specials.

- Fiona Apple has announced her first tour in five years and the short run of shows includes a March 21 visit to D.C.’s Sixth & I Historic Synagogue. In other local concert news, The-Dream is coming to Fillmore Silver Spring on March 17 and Marilyn Manson will be there on May 1.

- The Black Sabbath reunion tour is off. Health issues of guitarist Tommy Iommi and contract disputes with drummer Bill Ward have reduced a summer tour to Ozzy and Friends.

- RIP Michael Davis , bassist for Detroit garage rock legends MC5. He passed away at the age of 68 due to liver disease.