<s>
SingStar	B-Device
is	O
a	O
series	O
of	O
music	B-Application
video	I-Application
games	I-Application
developed	O
by	O
London	O
Studio	O
and	O
published	O
by	O
Sony	O
Computer	O
Entertainment	O
for	O
the	O
PlayStation	B-Device
2	I-Device
,	O
PlayStation	B-Operating_System
3	I-Operating_System
and	O
PlayStation	B-Operating_System
4	I-Operating_System
video	O
game	O
consoles	O
.	O
</s>
<s>
Gameplay	O
in	O
the	O
SingStar	B-Device
games	O
requires	O
players	O
to	O
sing	O
along	O
to	O
music	O
in	O
order	O
to	O
score	O
points	O
,	O
using	O
SingStar-specific	O
USB	O
microphones	O
which	O
ship	O
with	O
the	O
game	O
.	O
</s>
<s>
Over	O
70	O
different	O
SingStar	B-Device
SKUs	O
have	O
been	O
released	O
worldwide	O
,	O
featuring	O
over	O
1,500	O
disc-based	O
songs	O
.	O
</s>
<s>
Editions	O
of	O
SingStar	B-Device
for	O
the	O
PlayStation	B-Operating_System
3	I-Operating_System
&	O
PlayStation	B-Operating_System
4	I-Operating_System
support	O
downloadable	B-Protocol
content	I-Protocol
in	O
the	O
form	O
of	O
additional	O
songs	O
for	O
the	O
game	O
.	O
</s>
<s>
Over	O
1600	O
songs	O
have	O
been	O
made	O
available	O
as	O
downloadable	B-Protocol
content	I-Protocol
,	O
including	O
a	O
total	O
of	O
569	O
English-language	O
songs	O
.	O
</s>
<s>
The	O
success	O
of	O
the	O
SingStore	B-Device
exceeded	O
the	O
expectations	O
of	O
the	O
game	O
's	O
developers	O
,	O
with	O
over	O
2.2	O
million	O
songs	O
purchased	O
from	O
the	O
online	O
service	O
as	O
of	O
August	O
2008	O
.	O
</s>
