George Edwards has been hired as linebackers coach by the Miami Dolphins, who also announced they're retaining three assistants from last year's staff.

Edwards rejoins the Dolphins after spending the past two years as defensive coordinator for the Buffalo Bills. He coached linebackers for Miami from 2005 to 2009.

Tight ends coach Dan Campbell, strength coach Darren Krein and special teams coordinator Darren Rizzi have been retained by new head coach Joe Philbin.

Zac Taylor, who has been an assistant at Texas A&M, was hired as assistant quarterbacks coach.

The Dolphins announced the moves on Monday.

Kelly Clarkson will sing the national anthem and Blake Shelton and Miranda Lambert will sing "America The Beautiful" as part of Super Bowl XLVI pregame festivities at Lucas Oil Stadium in Indianapolis on Sunday, Feb. 5, the NFL and NBC announced today.

In addition, Lenny Kravitz and The Fray will help kick off Super Bowl XLVI as part of the pregame festivities at Lucas Oil Stadium.

More than 162 million viewers in the U.S. watched last year's Super Bowl, the most-watched television program in history. The pregame show, including the National Anthem and "America The Beautiful," and Super Bowl XLVI will be broadcast worldwide.

Clarkson will make her Super Bowl debut. She is among many great performers who have been honored with singing the national anthem including: Billy Joel, Diana Ross, Neil Diamond, Whitney Houston, Harry Connick, Jr., Garth Brooks, Natalie Cole, Vanessa Williams, Luther Vandross, Jewel, Cher, Faith Hill, the Backstreet Boys, Mariah Carey, Dixie Chicks, Beyoncé Knowles, Christina Aguilera and many more.

Shelton and Lambert join Vicki Carr (Super Bowl XI), Ray Charles (Super Bowl XXXV), Mary J. Blige and Marc Anthony (Super Bowl XXXVI), Alicia Keys (Super Bowl XXXIX), Faith Hill (Super Bowl XLIII), Queen Latifah (Super Bowl XLIV) and Lea Michele (Super Bowl XLVI) as the only artists to perform the song at the Super Bowl.

The NFL previously announced that Madonna will perform in the Bridgestone Super Bowl XLVI Halftime Show.