SingStar is one of the most successful casual franchises in Sony Computer Entertainment's portfolio, and today a new career opportunity ad seeking a Senior Programmer for SCE London Studio hints to the fact that the franchise is going to land on PS4:

London Studio is a member of Sony Computer Entertainment’s worldwide development studios based in Soho, London. We have a mission to create innovative and market leading games with broad market appeal, focused on social-group, play and entertainment. Our portfolio includes titles such as The Getaway, SingStar, EyeToy, EyePet and Wonderbook – technically acclaimed, multi-million selling franchises that pay testament to our attention to innovation and quality. We are looking for a talented and highly motivated generalist programmer,with an opportunity to join our world-class development team working on our next generation of titles. 

SingStar is celebrating its 10th birthday in May this year - the first disc was released on PlayStation®2 in 2004, and has since sold millions of copies around the world. Today, SingStar is available for free on PS3, offering songs from its online store, and has a vibrant online community. Looking to the future of SingStar, we’re planning further innovations as we continue to propel this hugely successful franchise into the next decade.

While the ad doesn't mention it explicitly, it's definitely a strong hint that a new SingStar title is at least in the planning phase, headed for the "next generation," meaning to the PS4. Of course we should take this with a pinch of salt until an official announcement is made, but it's pretty safe to assume that things are moving in Soho.