Taylor Swift just wrapped up her 1989 world tour in Los Angeles performing a total of four sold out shows in the city. The superstar singer didn't come solo either as she was joined on stage at the Staples Center by Justin Timberlake. The duo performed a duet of his smash hit 'Mirrors' on stage before she also brought Selena Gomez out to perform her single which features A$AP Rocky titled 'Good For You.' Peep Justin and Taylor's performance above.