SingStar is a competitive music video game series for PlayStation consoles developed by London Studio and published by Sony Computer Entertainment. Dozens of installments were released for the PlayStation 2 and several more for the PlayStation 3. It is also available on the PlayStation 4 as a free app download with users paying for the songs as individual or bundle downloads. The games have also undergone a number of non-English releases in various European countries. SingStar games on disc for PlayStation 2 and PlayStation 3 are distributed either as the software alone or bundled with a pair of USB microphones – one red one blue; wireless microphones are also available. The games are compatible with the EyeToy PlayStation Eye and PlayStation 4 cameras allowing players to see and record themselves singing. The PSP (PlayStation Portable) was also able to manage a playlist in realtime where users were able to queue songs they wanted to sing so the decisions weren't made between songs leading to fewer breaks.