There are multiple artists with this name.
1. A ska-punk band from Oklahoma City, OK.
2. An underground pop artist from Buffalo, NY.
3. A hard rock band from Balatonfüred, Hungary.
4. An acoustic indie-pop duo from Michigan. Now known as Those Willows.

1. Sunny Side Up is a Ska-Punk band from Oklahoma City, OK. Formed in 2010, Sunny Side Up combines bright brass hits, powerful guitar lines, roaring vocals, and quirky lyrics with fun, fast music. In an attempt to rid the ska genre of washed out cliches, SSU takes influence from innovative artists such as The Flaming Lips, Weezer, and more. Adding elements of metal, pop, rap, and more establishes SSU as an innovator of the genre. They've played alongside acts such as The Toasters, Anamanaguchi, Peelander-Z, Sublime With Rome, Bowling For Soup, Flatfoot 56, and more.

Their debut EP was released June 30th, 2011. It debuted at #1 on Bandcamp's Oklahoma chart.
It can be heard at http://sunnysideupska.bandcamp.com
In 2012, Sunny Side Up signed to label Tate Music Group. Their debut album was released in 2013.

The band consists of Lance Godfrey (lead vocals), Tanner Smith (guitar, backing vocals), Garland Moore (bass, rapper), Jake Jones (drums, Taylor Doak (trumpet), and Austin Meyer (trombone). Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.