With Adam Levine joining "American Horror Story," Miley Cyrus appearing on "Two and a Half Men," and Justin Bieber swinging by for a cameo on "The Simpsons," this fall TV season is going to be overwhelmed with musicians. Even Adam Lambert is returning to television -- for the "Pretty Little Liars" Halloween special -- and Snow Patrol's Gary Lightbody will be showing up on the next "Game of Thrones" season.
In honor of a fall schedule filled with music and TV crossovers, we've put together a list of the most painful small screen transitions that musicians have ever made. From Pete Wentz's time on "One Tree Hill," to Usher's minute on "Sabrina," to Britney Spears' one-off on "Glee," here are the 15 musical cameos that go down in history as TV's worst.
Katy Perry - "How I Met Your Mother"
"How I Met Your Mother" has had several entertaining, perfectly-timed cameos over its seven seasons. But Katy Perry's appearance, as the ditzy-but-pretty "Honey" whose real name Ted couldn't seem to remember, was not one of them. Her portrayal as a gullible (or "dumb," as Neil Patrick Harris put it) blind date for Ted -- who later found herself in Barney's bedroom -- bordered on annoying, and the cast's constant repetition of "Oh, Honey" every time Perry opened her mouth was too much to handle.
Usher - "Sabrina the Teenage Witch"
When Sabrina wanted to tell her boyfriend "I love you," who did she go to for help? Usher, a.k.a. "The Love Doctor," of course. The singer's few lines made us laugh (and cringe), but luckily the mood wasn't completely ruined -- Usher closed out the scene by doing what he does best, crooning with a trio of backup singers (who dressed up as sexy nurses… just because they could).
Pete Wentz - "One Tree Hill"
All of Fall Out Boy guest starred on the third season of "One Tree Hill," but it was Pete Wentz's multi-episode arc as Peyton's rockstar love interest that goes down in history as one of TV's worst cameos. Whether he was putting on his makeup alongside the ladies of Tree Hill or looking emo as a Fall Out Boy song played in the background, Pete's cameo felt forced and awkward. It's a toss-up which part of the episode was more hilarious: when Peyton called Pete a "famous rockstar" or when she quoted his "Pros and Cons of Breathing" lyrics before they started making out. The break-up came after a few episodes -- including one titled "I Slept With Someone In Fall Out Boy And All I Got Was This Stupid Song Written About Me" -- and "One Tree Hill" returned to the angst-ridden teen drama that would last for nine seasons.
Nick Jonas - "Smash"
The youngest JoBro's performance of Michael Buble's "Haven't Met You Yet" was one of the season's musical highlights, but his acting (and affected accent) was a flop. Nick Jonas' cameo didn't fit into the season's storyline, and he was forced into too many scenes: giving financial advice, hitting on the show's blonde bombshell lead, acting like a spoiled celebrity teen. We're glad the Jonas Brothers have been working on a new album -- they're better off in the studio than on the small screen.
Lance Bass - "7th Heaven"
'N Sync's Lance Bass had a short role on the 4th season of "7th Heaven," guest starring as Rick Palmer, Lucy Camden's short-term love interest and blind date. Watching Bass' uncomfortable, lackluster performance was painful in 2000, but now it's just funny. Plus we finally understand why he and Lucy never made a convincing couple all those years ago...