where it says bruno mars

Travis Thin  Suggested by Heron2001 
Engravers  Suggested by Heron2001 

For MARS

runo

looks like someone used Travis Thin - and extended it...

and that leaves the B
It reminds me of fonts that Sudtipos would put out - like a modified Mrs Blackfort or Miss Fitzpatrick -- closest I think - Mr. Canfields - backslanted.