Let's Go to the Mall is a Robin Sparkles song, released sometime in 1993 when Robin was 16. Young Robin had to travel to malls all over Canada and sing it.
Sandcastles in the Sand is a Robin Sparkles song and the artistic follow-up to "Let's Go To The Mall". It was featured in the titular Sandcastles in the Sand.
You Just Got Slapped was a song composed and performed by Marshall, with backup vocals sung by Barney. It was featured in Slapsgiving and then reprised again in Slapsgiving 2: Revenge of the Slap as the song featured in the commercial for Mickey Aldrin's game "Slap Bet".
Robin and Jessica perform "The Beaver Song"
Marshall had the best night ever, and decides to sing a song about it.
Inside the Actors Studio: The Cast of 'How I met your Mother'
How I Met Your Mother - Last Forever Series Finale - Alternate Ending
When Lily goes into labor, Ted and Robin distract her by telling her stories while Marshall hurries back from Atlantic City. Ted is conflicted when Victoria approaches him on her wedding day and asks him to elope. Meanwhile, Barney and Quinn are arrested by airport security while on the way to Hawaii when Barney refuses to open a box they are traveling with.
Robin takes steps to have Patrice fired from WWN, while Marshall puts a jinx on Barney. Later, Ted invites his architecture professor to the dedication of the GNB building, and Marshall and Lily bump into an oddball acquaintance from college. Christmas approaches and Ted wrestles with whether to tell Robin about Barney's intentions involving Patrice, while Marshall and Lily get an early Yule gift, a night away from Marvin, but a case of separation anxiety strikes and threatens to ruin the evening.
Ted finally finishes telling his kids the story of how he met their mother.