The relationship between Jennifer Aniston and John Mayer continues to stay strong -- the actress was spotted at the crooner's concert in south London this weekend, reports People magazine.
Jen -- who entered the concert from a side entrance -- watched John perform from a seat on the upper level. The couple recently met up in Amsterdam, where Mayer sang and Aniston promoted her new flick, "Marley and Me."
The pair has been heating up since April, when they were spotted in Maimi. Mayer is currently touring Europe, while Aniston has four movies coming out this year.