What song from the 70's goes Sha-la-la-la-la something something and then the chorus do-do-do-do-do do-do-do-do-do do do do Lyrics are hard to understand?

The song you're thinking of is likely "Na Na Hey Hey Kiss Him Goodbye" by Steam, released in 1969 but popular through the 70s. The chorus features the catchy "na na na na, na na na na" refrain, which can be misheard as "do-do-do." Its upbeat and memorable melody often makes it a staple at sporting events and parties.