Okay, Heidi Klum may not be a musician, but her career runs in the entertainment circuit, working as an actress, supermodel, television producer and host on the award-winning reality show Project Runway.
The German-American beauty had a cameo in HIMYM season 3, the episode 'The Yips'. She was one of the models at a Victoria's Secret Fashion Show after-party that Barney, Marshall and Ted attended.
Klum convinced distressed Barney to go back to Rhonda, the woman he lost his virginity to, and try to regain his sexual confidence. This happened after Barney learnt that his first sexual encounter was a sham and that Rhonda only praised him because his brother paid her, causing him to have the yips.
In 2018, Klum tweeted her cameo experience on the show, along with a video showcasing her performance alongside Neil Patrick Harris (Barney) and Josh Radnor (Ted).