How many songs are in the album "5 Years of mau5" by deadmau5?

There are a total of 21 songs in "5 Years of mau5".

When was the album "5 Years of mau5" by deadmau5 released?

"5 Years of mau5" was released on November 21, 2014.

#	Track	Artist	Key	Camelot	BPM
1	Some Chords - Dillon Francis Remix	deadmau5, Dillon Francis	E Major	12B	128
1	Ghosts 'n' Stuff (feat. Rob Swire)	deadmau5, Rob Swire	F Minor	4A	128
2	Ghosts 'n' Stuff (feat. Rob Swire) - Chuckie Remix	deadmau5, Rob Swire	A♭ Major	4B	128
2	Raise Your Weapon	deadmau5	D♭ Major	3B	140
3	I Remember - Vocal Mix	deadmau5, Kaskade	B Minor	10A	128
3	The Veldt (feat. Chris James) - Edit	deadmau5, Eric Prydz, Chris James	A Major	11B	128
4	Maths - Botnek Remix	deadmau5	A Major	11B	124
4	Some Chords	deadmau5	D♭ Major	3B	128
5	Raise Your Weapon - Madeon Extended Remix	deadmau5	A♭ Minor	1A	126
5	Strobe - Club Edit	deadmau5	A♭ Minor	1A	128
6	Strobe - Michael Woods 2014 Remix	deadmau5	A♭ Minor	1A	126
6	The Veldt (feat. Chris James) - 8 Minute Edit	deadmau5, Chris James	A Major	11B	128
7	I Remember - Shiba San Remix	deadmau5, Kaskade	G Major	9B	123
7	Brazil - 2nd Edit	deadmau5	B♭ Minor	3A	128
8	Raise Your Weapon - Wax Motif Remix	deadmau5	A♭ Minor	1A	128
8	Aural Psynapse	deadmau5	A♭ Major	4B	128
9	Sofi Needs A Ladder - Pig&Dan Remix	deadmau5	G Major	9B	248
9	Not Exactly	deadmau5	C Major	8B	128
10	Ghosts 'n' Stuff (feat. Rob Swire) - Nero Mix	deadmau5, Rob Swire, NERO	E♭ Major	5B	140
10	Sofi Needs a Ladder	deadmau5	F Major	7B	128
11	Raise Your Weapon - Michael Cassette Remix	deadmau5	D♭ Minor	12A	126