Who WASN'T at Riccardo Tisci's Birthday Party?

It goes without saying that a birthday boy like Riccardo Tisci can really fill out a venue. And he proved that point in a big way this weekend when the soon-to-be-40 star had the party of a lifetime with guests like Kim Kardashian, Jessica Chastain, Jared Leto, and Diddy in attendance. Ibiza is known for wild parties and late nights, and this weekend was no exception. Read on to see the inside-party snaps, see the celebrity birthday wishes, and feel a tinge of envy at the Givenchy artistic director's towering birthday cake.

Source: Instagram

Kendall Jenner Prepping For the Party

Kendall Jenner Prepping For the Party

Kim Kardashian's Birthday Instagram

Kim Kardashian's Birthday Instagram

Riccardo Tisci and Joan Smalls

Riccardo Tisci and Joan Smalls

Kanye West, Kim Kardashian, Kate Moss, and Naomi Campbell

Kanye West, Kim Kardashian, Kate Moss, and Naomi Campbell

Joan Smalls, Kendall Jenner, Kim Kardashian, and Afef Jnifen

Joan Smalls, Kendall Jenner, Kim Kardashian, and Afef Jnifen

Diddy and Riccardo Tisci

Diddy and Riccardo Tisci

Pedro Almodovar, Jessica Chastain, and Riccardo Tisci

Pedro Almodovar, Jessica Chastain, and Riccardo Tisci

Party guests including Naomi Campbell, Kate Moss, and Cassie

Party guests including Naomi Campbell, Kate Moss, and Cassie

Riccardo Tisci and Kate Moss

Riccardo Tisci and Kate Moss

Riccardo Tisci and Naomi Campbell

Riccardo Tisci and Naomi Campbell

Party Guests Including Riccardo Tisci, Naomi Campbell, Kim Kardashian, and Kanye West

Party Guests Including Riccardo Tisci, Naomi Campbell, Kim Kardashian, and Kanye West

Kanye West's Performance

Kanye West's Performance

Riccardo Tisci's Birthday Cake

Riccardo Tisci's Birthday Cake

Kendall Jenner and Justin Bieber

Kendall Jenner and Justin Bieber

Kris Jenner, Riccardo Tisci, Justin Bieber, Kim Kardashian, and Kendall Jenner

Kris Jenner, Riccardo Tisci, Justin Bieber, Kim Kardashian, and Kendall Jenner

Justin Bieber and Kris Jenner

Justin Bieber and Kris Jenner

Natasha Poly and Riccardo Tisci

Natasha Poly and Riccardo Tisci

The Morning After

The Morning After