My friend from Argentina has an upcoming concert and I'd like to wish him good luck. In the United States, I would say "Break a leg", but I doubt that would translate very well. So I was thinking I'd say something like: "Sending you good vibes".
How would I say "Sending you good vibes" in Spanish? Any other suggestions on how to wish a performer from Argentina good luck (without jinxing them)? Is there something equivalent to the expression "break a leg"?
I've just started learning Spanish, and I don't want to offend this person. Thanks in advance for you help. I really appreciate it.