Name That Tune - Round 13 Mystery Cache

And now, on to the next round of Name That Tune...
Are you ready for more fun?...
Just like the earlier rounds, you will be supplied with one or more lines of song lyrics, you must guess the song title and use it to solve the puzzle.

"...I've seen your picture
Your name in lights above it
This is your big debut
It's like a dream come true..."

Use a simple substitution to transform each letter of the song title into a
number (a=1, b=2, c=3, etc.) and plug those into the formulas below to find the final coordinates:
N 42° 02.ABC W 087° 55.DEF.

A = 1st letter² - 256
BC = (1st letter * 2nd letter) - 6
D = 3rd letter
E = 2nd letter + 3
F = 3rd letter + 1