Garth Brooks, 5 Millionth Fans ... You Get a Car, You Get a Car!!! (PHOTOS)

Garth Brooks is nothing if not ridiculously generous ... he surprised a husband/wife who became the 5 millionth fans to take in his world tour with not one, but 2 cars.

Sources at the arena tell us the couple scored a Lexus SUV and a Nissan truck before Friday's Edmonton, Alberta concert.

They also got a $5k Amazon shopping spree, a $5k Edmonton mall spree, a trip for 2 to the Wynn in Vegas, and a bunch of Garth and Trisha Yearwood merch.

By the way ... Garth broke his own concert attendance record. Back in the 90's his tour hit 5 million tickets sold in 100 cities. This time around it was 5 mil in just 60 cities.

It's like winning the lottery in low places.