Norbert and Daggett find themselves right in the middle of a rock n' roll festival when a group decides to hold a concert in the area. However, Norbert soon meets the love of his life amidst the audience of the concert, though Daggett decides to try to get them to leave the vicinity.
- Official debut of Treeflower.
- The song "I Think I Like You" features psychodelic images common in the 1960s hippie scene. Many of these include rapidly-shifting color patterns. As such, people who have photosensitive epilepsy (PSE) should be careful when watching this episode or avoid watching it altogether.
- The title of this episode is a take-off of the "Summer of Love", the summer from the late 1960's.
- Woodstock - The Awesome Beaver Pond Rock Festival, which was built above Norb and Dag's home, is a parody to Woodstock, the rock festival from the 1960's.
- The Treasure of the Sierra Madre; Blazing Saddles - Dag's line "Backstage passes? Backstage passes! We don't need no stinking backstage passes!" is a parody of the line "Badges? We don't need no stinking badges!" from the 1948 film and also in the parodied version from the 1974 Mel Brooks film.
- "Won't Get Fooled Again" - When Treeflower and Norb are saying how they feel as if they've known each other their entire lives, the music playing in the background is the instrumental solo from the 1971 song by The Who.
- The Beatles - The intro to their song "All You Need Is Love" is heard in the background when Daggett, disguised as Ringo Starr, steps out of a limo. The Beatles song "Sgt. Pepper's Lonely Hearts Club Band" is then briefly heard when Daggett tries to sneak into the festival when he has balloons of John Lennon, Paul McCartney, and George Harrison tied on his tail.
|The image gallery for Bummer of Love may be viewed here.|
- Richard Horvitz as Daggett
- Nick Bakay as Norbert
- Cynthia Mann as Treeflower
- Will Ferrell as Bouncer (uncredited) 
- Singer: Quinton Flynn
"Food of the Clods"