The pair attend Taylor Swift s concert together in Los Angeles

Credit: Amanda Schwab/Startraks

Justin Timberlake has been busy filming Bad Teacher with his ex, Cameron Diaz – but he spent some quality time with his real life leading lady Jessica Biel this week.

The couple showed their love for Taylor Swift at the country star s concert in L.A. Thursday night, popping backstage with a group of friends to greet the singer after the show.

Biel and a group of pals checked out Swift s “T-Party” room, a backstage lounge set up with pillows, candles and food, while Timberlake had a long chat with Swift (who covered Timberlake s “What Goes Around…Comes Around” in her set).

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Other celebs on hand for the show included Kobe Bryant and family, Jennie Garth and her daughter, Master s champ Phil Mickelson and Katy Perry, who sang a duet with Swift on Perry s hit “Hot and Cold.”

This was Timberlake and Biel s second musical outing in as many days: The two were spotted at the Matt Morris show at L.A. s the Mint on Wednesday night.

With reporting by MELODY CHIU