feat. AKB48
Want me to upload the rest of the soundtrack? Let me know in the comments.
Lyrics (In Romaji/English Translated by @nanamekrmariko):

donna michita tte massugu janai darou
sou magari kune tte
dekoboko shiteru hazu sa
tsurai koto toki ni wa aru you ne
bokutachi wa soredemo hashiru yo
amaimono te mo ikaga？

[All roads
Aren't straight
Yes, they're windy
And bumpy most likely
Things can get rough from time to time
We'll keep running though
Would you care for something sweet?]

S-U-G-A-R Jump into your racing car It's SUGAR RUSH! SUGAR RUSH!
S-U-G-A-R Jump into your racing car It's SUGAR RUSH! SUGAR RUSH!

kanashikunattara
mabuta wo tojite goran
hora yume no naka nara
namida wo wasurerareru
moshi koko de DANCE toshi datte
bokutachi wa anata tari shinai
amaimono te mo ikaga?

[If you get sad
Just close your eyes
See, in your dreams
You can forget your tears
Even if our engine stalls here
We won't panic
Would you care for something sweet?]

S-U-G-A-R Jump into your racing car It's SUGAR RUSH! SUGAR RUSH!
S-U-G-A-R Jump into your racing car It's SUGAR RUSH! SUGAR RUSH!

karada no highway wo kake meguru yo tobun wo genki no gasoline ni oh-

[Come down the highway
Running through
Open Road
Gasoline of energy
Oh-]

S-U-G-A-R Jump into your racing car It's SUGAR RUSH! SUGAR RUSH!
S-U-G-A-R Jump into your racing car It's SUGAR RUSH! SUGAR RUSH!
S-U-G-A-R Jump into your racing car It's SUGAR RUSH! SUGAR RUSH!
S-U-G-A-R Jump into your racing car It's SUGAR RUSH! SUGAR RUSH!