TV Buzz: Sean Combs to Appear on FX’s ‘It’s Always Sunny’; Carly Rae Jepsen Performs on ‘So You Think You Can Dance’ Finale

'Glee' gets top ratings
The Season 4 premiere pushed FOX to No. 1 on Thursday.
SNL Season Premiere
Seth MacFarlane channels Olympian Ryan Lochte.
Sean “Diddy” Combs is making an appearance in Philadelphia on an episode of FX’s It’s Always Sunny in Philadelphia. Though there are few details surrounding the hip-hop mogul’s role, he is set to begin filming on Monday. The eighth season of It’s Always Sunny premieres on FX on October 11. [THR]

“Call Me Maybe” singer Carly Rae Jepsen will appear on Tuesday’s season finale of FOX’s dance reality competition, So You Think You Can Dance. The 26-year-old will perform her newest single, “This Kiss,” to coincide with the release of her debut album, Kiss. The season finale of SYTYCD will air Tuesday at 8 PM on FOX. [FOX]

When will Shameless, House of Lies and Californication return to Showtime? 

Showtime has set the winter 2013 premiere dates for Shameless, House of Lies and Californication and given us a tidbit of what we should expect when the shows return. Shameless will pick up a few months after last season with Jimmy (Justin Chatwin) moving into the Gallagher home. On the seccond season of House of Lies, Marty (Don Cheadle) and Jeannie (Kristen Bell) will have to deal with the fall out from the big merger showdown. As for Californication, Maggie Grace (Lost) will join this season and develop an interesting relationship with Hank (David Duchovny). All three series will return on January 13, 2013 starting with Shameless at 9 PM. [Showtime]

Jenna Dewan has been cast in the Lifetime pilot, Witches of East End. The star, who will appear in American Horror Story this fall, will play Julia Ormond’s daughter, Freya Beauchamp. The character is described, as a former wild child who will find out she’s a witch shortly after she settles down with her fiancé. [TVLine]

The It Gets Better project will air a second special this October on MTV and Logo. The program will include stories from young Lesbian, Gay, Bisexual and Transgender (LGBT) people and will be anchored by columnist/It Gets Better creator Dan Savage. The 60-minute special will air two days before National Coming Out day on Tuesday, Oct. 9 at 11 PM. [MTV]

Stanley Tucci is headed to PBS. The accomplished actor recently seen in The Hunger Games will host the network’s documentary series, Independent Lens. Previous hosts include America Ferrara and Don Cheadle. The season will officially begin on Monday, Oct. 29 at 10 PM but will preview with Brad Lichtenstein’s As Goes Janesville on Monday, Oct. 8. [EW]