For big kids, karaoke is dependent on friends, good track lists and alcohol. Remove any one of those elements - especially the alcohol - and there's probably going to be a problem. So, it's not unexpected when potentially sober and lonely video game reviewers get their hands on Lips, it's going to result in some scattered scores. Given Europe's long-standing history with SingStar, it's really not surprising to see Eurogamer's writeup on Lips being less a review and more a comparison between the two franchises.

Videogamer (80/100): "It's the only game of its type on the 360, it's got brilliant microphones and it at least tries to allow you to expand the potential track-list to infinity. If you like karaoke, and you have friends or family that like karaoke, it's a damn sight better in-law entertainment option than charades this Christmas, and for that we should be eternally grateful"
Kikizo (80/100): "While the ability to sing to your own music collection has its problems, overall Lips is absolutely brilliant fun, as well suited to a Saturday morning with the kids as it is a late return from the pub. In the end, that's what this kind of game should be about, and as a rival to SingStar, Lips can happily call itself equal. "
Gamespot (65/100): "The wireless microphones are convenient and innovative, and they make it difficult to go back to corded models afterwards. The song selection is also excellent, with 40 songs that are varied in style but united in anthemic quality. That said, the game's lack of camera support, vocal playback, and simple online functionality disappoint, especially given their proven success in Sony's SingStar series. Even worse, the nonexistent difficulty level means this is a game with practically no appeal for single players, aside from those who want to collect the easy achievement points."
Eurogamer (50/100): "But the saddest thing about Lips is that it suffers in comparison to SingStar's gameplay. We've long moaned about legacy issues with SingStar - that it can't cope with vibrato, punishes you for tailing off at the right time, and has a bit of lag in audio playback - but despite Lips' fancy mics and superficial improvements, it's too easy, too isolated from other players, and too buggy. The irony is that SingStar has glitches as well, now and then, and casual gamers seem to put up with this, whereas Microsoft - architect of the Red Rings - has little goodwill left to cash in on that front. Casual or not, though, you should only buy this if you can't get SingStar."