You can’t beat The Beatles, you join ’em.
Meaning of the quote
The quote means that if you can't compete with or be better than something successful, the best thing to do is to accept it and join it. In this case, the quote suggests that you shouldn't try to beat The Beatles, a very popular and successful music group, but instead you should join them and be a part of their success.

About Peggy Lee
Peggy Lee was an iconic American jazz and pop singer, songwriter, and actress who had an incredible career spanning seven decades. She wrote music for films, acted, and recorded conceptual albums combining poetry and music, cementing her status as the “Queen of American pop music” with over 1,100 master recordings and 270 co-written songs.
More quotes from Peggy Lee
I’m always happy when I’m cleaning, and besides, I had just found out that I was going to have a baby.
American singer (1920-2002)
Retire? Not on your life. I have no plans to stop singing. What are you going to do when you love music? It’s a terrible disease. You can’t stop. Of course, I’d like to get off the road.
American singer (1920-2002)
I really don’t have that many run-ins. People by and large are very nice to me.
American singer (1920-2002)
You can’t beat The Beatles, you join ’em.
American singer (1920-2002)