"Mainstreet" is the title of a song

Song

In music, a song is a composition for voice or voices, performed by singing.A song may be accompanied by musical instruments, or it may be unaccompanied, as in the case of a cappella songs...

 written and recorded by Bob Seger & The Silver Bullet Band. The eponymous street is that of Ann Arbor, Michigan

Ann Arbor, Michigan

Ann Arbor is a city in the U.S. state of Michigan and the county seat of Washtenaw County. The 2010 census places the population at 113,934, making it the sixth largest city in Michigan. The Ann Arbor Metropolitan Statistical Area had a population of 344,791 as of 2010...

, Seger's childhood home. It was released in April 1977 as the fourth single from the album Night Moves

Night Moves (album)

Night Moves is the ninth studio album by American rock singer Bob Seger, and his first with the Silver Bullet Band. It was released in October 1976...

The song peaked at #24 on the U.S. Billboard Hot 100 but reached number-one in Canada.

It is in the key

Key (music)

In music theory, the term key is used in many different and sometimes contradictory ways. A common use is to speak of music as being "in" a specific key, such as in the key of C major or in the key of F-sharp. Sometimes the terms "major" or "minor" are appended, as in the key of A minor or in the...

 of D major, though some may consider it D Mixolydian

Mixolydian mode

Mixolydian mode may refer to one of three things: the name applied to one of the ancient Greek harmoniai or tonoi, based on a particular octave species or scale; one of the medieval church modes; a modern musical mode or diatonic scale, related to the medieval mode.-Greek Mixolydian:The idea of a...

.

Chart performance

Chart (1977)	Peak position
Canadian RPM Top Singles	1
U.S. Billboard Hot 100	24