Justin Herbert’s a first-round NFL draft pick, a two-time Pro Bowler and now, a male music video vixen. Madison Beer, the Chargers quarterback’s popstar girlfriend , revealed on Wednesday Herbert is appearing in the new visuals for her song, “lovergirl.” The vid is slated to drop on Friday, but in some teaser footage Beer shared to her Instagram page, she made it clear Herbert’s playing a big role in the project. Justin Herbert and Madison Beer have been dating since last summer. Kevin Mazur/Getty Images for The Recording Academy In the brief clip, Beer could be seen singing to her 28-year-old boyfriend, before the two share a kiss. “lovergirl music vid ꒰ᐢ. .ᐢ꒱₊,” Beer, 27, wrote in a caption on the video. “♡ friday w deluxe.” Beer’s mom, Tracie, put her stamp of approval on the Herbert cameo when she later dropped by the comment section and wrote, “The cutest.” Justin Herbert recently called Madison Beer “my world!” in an Instagram post.…