Petra Haden, although the original song was written by the Bellamy Brothers.
From a Toyota press release: The artist is Petra Haden. She sings it acapella...every sound you hear, even the "instruments" are her: http://tinyurl.com/qnxqjz
the original song is by the bellamy brothers, called "let your love flow." petra Hayden sings it in the commericial.
let your love flow
its sung by "petra haden"
Let Your Love Flow by the Bellamy Brothers.
Flow
Flow Rida
the song was "let your love flow" by the bellamy brothers
Smoke Jumpers
Pearl Jam
Think it was Pearl Jam
Because Companies pay less for commercials during NASCAR Races, so the TV Station will try and squeeze more commercials in to balance out the money flow.