Australian singer/DJ Brown continues her U.S. breakthrough with 'We Run the Night,' while DMB returns with new single 'Mercy.'
Havana Brown continues her marathon rise up Billboard'sQ&A column, LMFAO 's "Party Rock Anthem," featuring Lauren Bennett and GoonRock, manages a feat that only one other song in the Billboard Hot 100 's 54-year history previously had.
As it rebounds 50-49 in its 68th week, "Party" becomes the second title to grace the Hot 100 a year after reaching No. 1. It began a six-week reign the week of July 16, 2011. (This week's charts are dated July 21, 2012.) The first such long-lasting topper? The Black Eyed Peas ' "I Gotta Feeling," which rose to No. 1 on July 11, 2009, and remained charted through July 17, 2010.
"Party" additionally extends its record for the slowest fall from No. 1. Its 48-week decline is four weeks longer than the previous mark of 44 frames established by Savage Garden's "Truly, Madly, Deeply" in 1998.
"Party" is now one week from tying LeAnn Rimes' "How Do I Live" (69 weeks, 1997-98) for the second-longest stay in the Hot 100's archives. Jason Mraz's "I'm Yours" leads with a 76-week run in 2008-09.
'MERCY' MAKES ENTRANCE: Dave Matthews Band  debuts its first song on the Triple A adult alternative chart since 2009, as "Mercy" launches at No. 12, marking the chart's highest launch by a group this year. The song previews the band's eighth studio album, "Away From the World," due Sept. 11.
Since the Triple A chart premiered the week of Jan. 20, 1996, Dave Matthews Band boasts the most appearances. Here's a look at the list's most frequent visitors:
24, Dave Matthews Band (Matthews has also charted five solo entries)
22, Sheryl Crow
21, U2 
20, Coldplay 
19, Jack Johnson
17, John Mayer 
15, Counting Crows
14, Eric Clapton
13, Train 
On Sept. 22, Matthews will perform alongside acts including John Mellencamp , Willie Nelson and Neil Young at Farm Aid 2012. Since 1985, Farm Aid has raised more than $40 million to support programs designed to support American farmers and promote food consumption from family farms.
"We all see what's happening with agriculture, what's happening to our small towns. They are going out of business," Mellencamp says . "We're still doing Farm Aid because it is contributing. It's doing a job."