Kanye West celebrated his 36th birthday on Saturday night, heading out to party in New York with friends including Beyoncé and Jay-Z.
But one person close to the singer's heart was missing – Kim Kardashian, his girlfriend of more than one year who is expecting their first child.
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The reality star, 32, stayed in Los Angeles because she is no longer able to travel by plane ahead of the birth of their baby daughter next month.
Although she couldn't be there to party with her rapper beau, the brunette beauty was clearly thinking of him. She publicly declared her love for Kanye, taking to microblogging media site Twitter to wish him happy birthday on Saturday.
"Happy Birthday to my best friend, the love of my life, my soul!!!! I love you beyond words!" Kim – who recently celebrated the approaching arrival of her first child with a baby shower – tweeted to her nearly 18 million followers.
Accompanying the touching caption was an adorable photo collage, featuring six shots of the couple looking madly in love.
Kanye, who was in New York ahead his performance at the Governor's Ball, rang in his birthday at Caribbean-inspired hotspot Ms Lily's in downtown Manhattan.
One of the stars who attended the birthday bash was Beyoncé, who showed off her incredibly toned stomach in a crop top and pencil skirt ensemble featuring bold horizontal stripes.
The superstar enjoyed the party as she cuddled up to her husband Jay-Z.
It seems that Kanye was keen to have a low-key birthday celebration. This time last year Kim splashed out when she bought him a Lamborghini worth approximately £500,000.
But, as they await the arrival of their new baby, Kanye reportedly advised her not to go for a lavish present. A source said: "He doesn't want Kim to think about trying to do something big for him on his birthday when she's pregnant.
"All he really wants for his birthday is peace of mind for him and Kim."