There were lots of premiere of shows that included Gossip Girl and Lincoln Heights. I really don't watch any of the other premieres.
Lincoln Heights is about Eddie Sutton is a police officer who moved his family to his old neighborhood called Lincoln Heights. Eddie wants to make Lincoln Heights better and a safe place for his family. His family also has to adjust at living in a new neighborhood with a new school and neighbors. Cassie soon falls in love with a guy named Charles.
Here is the commercial for Lincoln Heights
Gossip Girl is about
Gossip Girl features ensemble cast of nine regular speaking roles which were mainly adapted from the book series. The series began with the mysterious arrival of former 'it girl' Serena van der Woodsen (Blake Lively), who attempts to start a new page in her life with her friends and family. Dan Humphrey (Penn Badgley), an outsider who becomes a part of the turbulent Manhattan scene, is Serena's main love interest whom she starts dating in the first episode. Blair Waldorf (Leighton Meester) is a beautiful Queen Bee of Manhattan's social scene, Serena's best friend, ally, and often rival, on whom the show is strongly focused. Nate ArchibaldChace Crawford) is wealthy and popular guy, always confused with his feeling and the paths in his life. Chuck Bass (Ed Westwick) serve as the show's antihero, he is a womanizer and party lover with a troubled life and past. The five mentioned characters serve as the show's focal point, while the other characters contribute in subplots. Jenny Humphrey (Taylor Momsen) is Dan's younger sister, who desperately tries to become the next Queen Bee, a goal that makes her realize the true values of life, which she eventually accomplishes. Vanessa Abrams (Jessica Szohr) who enters the show in its first season as Dan's past love, becomes a series regular after the 14th episode of the first season, where her storyline drastically changes and she falls deeply for Nate. (A major subplot in the show involves Serena's mother Lily van der Woodsen (Kelly Rutherford) and Dan's father Rufus Humphrey (Matthew Settle), both of whom share a romantic past which follows them throughout the show, and eventually leads to marriage. Other characters include Eric van der Woodsen (Connor Paolo) Serena's overly caring gay brother, who becomes very close with Jenny; and Georgina Sparks (Michelle Trachtenberg), the main antagonist in the show, but with a recurring role. (Source)
Here is the commercial for Gossip Girl