Shake 1 shot vodka, 1 shot orange liqueur (I use Patron Citronge-dont use a low alcohol, syrupy triple sec), and 1 shot lemon rum (I use Bacardi Limon) vigorously over ice. Strain into a pint glass with a few icecubes. Add 2-3 shots of good orange juice and top it off with champagne until the glass is full. Give it a gentle stir and garnish with an orange slice.