"So Happy" is a single by Theory of a Deadman

Theory of a Deadman

Theory of a Deadman is a Canadian rock band from Delta, British Columbia, formed in 2001. The band is currently signed to Roadrunner Records as well as Island Records. The band also includes traits of other music styles, such as country and acoustic, as well as their post-grunge and alternative...

, and the first to be released from their third album Scars & Souvenirs. It was officially released to radio on February 11, 2008, although many rock stations in the United States added it to their rotations earlier. "So Happy" debuted on Billboard's Mainstream Rock Tracks

Mainstream Rock Tracks

Hot Mainstream Rock Tracks is a ranking in Billboard magazine of the most-played songs on mainstream rock radio stations, a category that includes stations that play primarily rock music. Modern rock tracks are counted in the Alternative Songs chart.This chart began with the March 21, 1981, issue...

 chart on February 9, 2008, and peaked at #2 on April 5, 2008. The song needed only three weeks to become a top-10 hit on the Mainstream Rock chart, making it their fastest top-10 entry to date. It is also the band's first top-20 hit on the Modern Rock Tracks

Modern Rock Tracks

Alternative Songs is a music chart in the United States that has appeared in Billboard magazine since September 10, 1988. It lists the 40 most-played songs on modern rock radio stations, most of which are alternative rock songs...

 chart. In Canada, it debuted (and peaked) at #58 on the Canadian Hot 100 on March 8, 2008.

The song features Shinedown

Shinedown

Shinedown is an American rock band from Jacksonville, Florida, formed in 2001 and founded by members Brent Smith , Brad Stewart , Jasin Todd , and Barry Kerch . A few line-up changes followed, and the band's current line-up consists of Smith and Kerch, the band's only two remaining original...

 vocalist Brent Smith

Brent Smith

Brent Smith is the lead vocalist and singer-songwriter of the band Shinedown. His biggest influences as a singer are Otis Redding, Billie Holiday, and Chris Cornell.-Personal life:...

 performing backing vocals.

Music video

The music video first aired on MuchMusic

MuchMusic

MuchMusic is a Canadian English language Category A specialty channel owned by Bell Media. MuchMusic is dedicated to music-related programs, pop and youth culture.-History:...

 in the middle of April 2008. It peaked on the MuchMusic Countdown

Countdown (MuchMusic TV series)

The MuchMusic Top 30 Countdown is a ninety-minute music video program block, that airs on Canadian music television station MuchMusic. Countdown is one of the oldest programs that continues to be aired on Much Music since its debut...

 at #10.

The video features Serinda Swan

Serinda Swan

Serinda Swan is a Canadian actress and model. She stars in the new series Breakout Kings as Erica Reed.-Life and career:Swan was born in West Vancouver, British Columbia, Canada....

.

Chart positions

Chart (2008)	Peak position	Peak date
Canadian Hot 100 Canadian Hot 100 The Canadian Hot 100 is a music singles popularity chart issued weekly by Billboard magazine which ranks songs in Canada. The chart debuted in the Billboard issue dated June 16, 2007 and was made available for the first time via their online services on June 7, 2007...	58	March 8, 2008
U.S. Hot Mainstream Rock Tracks	2	April 5, 2008
U.S. Hot Modern Rock Tracks	17	May 3, 2008