Blue Tattoo is the third album by the Estonian girl band Vanilla Ninja, and the last original Vanilla Ninja album released by Bros Records. Following the successful 2004 album Traces of Sadness, Blue Tattoo was the group's most successful album yet with the singles "Blue Tattoo" (from which the album gets its name), "I Know" and "Cool Vibes". "Cool Vibes" was also the 2005 SwissEurovision entry, increasing the album's popularity in Switzerland.
In both Switzerland and Germany it peaked at #4 in the charts, with an Austrian chart high of #7. The album also topped the Estonian album chart.