Los Angeles Chargers quarterback Justin Herbert's girlfriend, Madison Beer, shared a picture of herself grooving to her new single “Bittersweet" on Saturday.In a photo shared on Instagram, Beer wore a butter cream-colored top with delicate lace details, accessorized with large hoop earrings. The song “Bittersweet," which dropped on Friday, played in the background.Lyrics of the song are:“I know I should be bitter, but baby / Right now I’m bittersweet. I’m getting over what you put me through / And I’d say I’m done crying, but baby / I don’t lie like you do.”Source: (Via Instagram/ @madisonbeer)The Instagram story promoting "Bittersweet" comes just days after Justin Herbert made their relationship public on the sidelines.Just minutes before the game against the Commanders on Sunday, Herbert jogged over during warmups and shared a quick kiss with Beer, who was standing on the sideline with friends. She wore a custom Chargers jacket and light denim jeans.While attending the Blue Jacket Los Angeles fashion show on Tuesday, Madison Beer’s mom, Tracie Beer, said to TMZ that her daughter is “happy” in her relationship with Herbert.Justin Herbert and Madison Beer went on a date after the Chargers beat Chiefs in season openerAfter a strong start to the 2025 NFL season, Justin Herbert and Madison Beer were spotted enjoying a cozy date night in Los Angeles on Sept. 9.The couple was seen leaving the popular restaurant Delilah, hand in hand. Beer wore a white top with black polka dots, paired with dark pants. She accessorized the outfit with sunglasses and a small handbag. Herbert was dressed in a black T-shirt and dark jeans. He finished the look with white sneakers. View this post on Instagram Instagram PostThe Chargers beat the Chiefs 27-21 in Week 1 in São Paulo, Brazil. Herbert threw for 318 yards and three touchdowns. He also had a key sideline run that helped seal the win.It was the Chargers’ first victory over the Chiefs since 2021.Herbert is in his sixth NFL season. He has racked up 1,229 passing yards and eight touchdowns in five games.