As part of their ongoing concert tour Sweat, pop icons Charli xcx and Troye Sivan performed to a second sold-out crowd at the Kia Forum in Los Angeles on Wednesday, October 16, and the guest star of the night was none other than Vinnie Hacker! See on Instagram Sivan brought the TikTok and social media star on stage and gave him a lap dance during his performance of "One of Your Girls," and grinded on him while the crowd screamed. (@) But who is he exactly? Hacker is a popular influencer and model (@) The 22-year-old influencer has almost 5 million followers on Instagram and over 15 million on TikTok, a massive audience across social media platforms. He's most known for his tattoos and has been modeling since he was 15.Sivan and Hacker have previously interacted@troyesivanI got u king Sivan has previously thirsted over the influencer on TikTok, responding to a video Hacker posted about needing "insane top" with a video of his rushing to get ready.Unfortunately, Hacker was compared to the Sweat Tour's Tuesday night guests (@) Kesha and Tate McCrae stormed the stage on Tuesday night's LA show, so some fans were disappointed Hacker was the only guest of the night. He responded to the reactions on X (formerly Twitter), saying, "Sorry u guys didnt get a better guest but I tried my hardest," he wrote, adding, "regardless it was fun and the crowd was amazing :)."Feel free to scroll through some of Vinnie's photos... for, um, you know... science...!See on InstagramSee on InstagramSee on InstagramSee on InstagramSee on InstagramSee on Instagram