SM Entertainment announced on March 16 that Red Velvet member Irene is releasing her first full-length album titled 'Biggest Fan,' which will deliver uplifting energy to fans. The album consists of 10 tracks including the title song of the same name, with all songs becoming available on music streaming sites on March 30 at 6 PM. The title track 'Biggest Fan' is a pop-dance song featuring a catchy groove on bass with relaxed narrative rap and addictive chant lines, delivering a sincere message of positive influence to fans based on valuable lessons Irene has learned. Through this song, Irene boldly expresses that fans can freely embrace their fandom while portraying the reciprocal relationship where fans and artists become each other's biggest supporters. The first teaser image and mood clip released on Red Velvet's official SNS channels at midnight on March 16 showcase Irene's flawless visuals as a virtual switch advertisement model, heightening anticipation for the new album. The album will also be released as a physical CD on March 30, with pre-orders currently available at both online and offline music retailers.