BLUE组合发迹于英国伦敦，由Duncan James、Antony Costa、Lee Ryan以及Simon Webbe，从19到23岁的4人所组成。2001年出道以来得过10项英国音乐大奖，又曾获得全英音乐奖「最佳团体」、「最佳流行艺人」等多个奖项。除了英国和欧美国家之外，他们的人气旋风更横扫了东南亚、日本及台湾等地。

此CD专为意大利等地歌迷制作，Blue同时编曲演唱若干首意大利语歌曲。

4Ever Blue is the second compilation album by British boyband Blue.

Following the release of Best of Blue, band members Simon Webbe and Antony Costa made the decision to release an album compiling a selection of the group's b-sides, remixes and previously unreleased material. The album also includes three tracks only previously in Japan: "The Gift", "It's Alright" and "Elements". The album also includes band member Duncan James' debut solo single, "I Believe My Heart". By the indication of the album booklet, a live version of "Lonely This Christmas" from CD:UK was intended to be track seven on the album, however, was removed from the tracklisting for unknown reasons. The album was released in July 2005, becoming available in several European countries, as well as Japan, Thailand and China, however, was a commercial failure and failed to chart anywhere. The album was not released in the UK, despite copies being widely available.