The SKIMS may have stolen the show, but Billie Eilish's latest TikTok clip showed some insight into the process of filming her pajama-clad, sleepover-themed. The 19-year-old Happier Than Ever superstar supplied some behind-the-scenes footage on TikTok from the shoot for her video, โ€œLost Cause,โ€ which dropped earlier in the week. In the.