Invincible Summer is the fifth solo album by k.d. lang, released by Warner Bros. Records in 2000. The album's title derives from a quote by Albert Camus: "In the depths of winter, I finally learned that within me there lay an invincible summer."
In an Allmusic review, Stacia Proefrock wrote "Glowing with happiness and lovey bliss, this lush album is dripping with the kind of bright, slick production that hasn't seen much light since the Brill Building's heyday. Swelling strings, electronic bubbles and warbles, and the occasional mandolin combine to create a sound that manages to evoke a warm feeling of nostalgia without sounding retro. Topping it all off is lang's smooth-as-maple-syrup voice, which shows even greater range than before."
In a three-and-a-half star Rolling Stone review, James Hunter wrote "On 'Invincible Summer,' k.d. lang reorchestrates the relaxed loveliness of Sixties Southern California pop and, to a lesser extent, Brazilian music...The music is often quick-paced fluff with the retro exactness, and the soul, of a Pottery Barn sofa. But for the most part, lang's lighter musical tack encourages her to retire the galloping self-regard that can cancel the attractiveness of her voice."