How I Met Your Mother: 10 Most Embarrassing Moments

2. Space Teens

Another Robin Sparkles episode but this time she is hosting a kids educational TV programme called Space Teens. She and co-host Jessica Glitter (played by Nicole Scherzinger) use maths to solve crimes. The premise alone is ludicrous but it gets worse from there. Both Jessica and Robin have two pet beavers who aid them in solving their space themed crimes and in a hilarious segment, another host, Alan Thicke, has the two girls work out how many inches of wood their beavers need to "devour" in order to keep them "well-fed all weekend long". The beaver innuendo doesn't stop there, however - towards the end of the episode the ex Space Teens sing a seemingly sweet song about Canada's favourite animal, but, of course, the HIMYM writers have turned it into something incredibly filthy. "Two beavers are better than one, they're twice the fun, ask anyone! A second beaver can be second to none!" It's another classic addition to building the history around Robin's humiliating past and having a massive name like Scherzinger turning up to add her talents to the beaver song just supplements the cringe.