Justin Bieber celebrates 20th birthday with family

Justin Bieber's father Jeremy, flew to his new home in Atlanta, Georgia with his other kids, Jazmyn, five, and Jaxon, four, to help him mark his 20th birthday on Saturday.

Jeremy, who reportedly has split from his younger kid's mother Erin Wagner recently after seven years, wrote on Twitter: "Happy Birthday son. Wow 20!," the Mirror reported.

Justin's mother Pattie Mallette, who split from Jeremy when the teenage icon was just two, also tweeted: "Happy Birthday YOU KNOW WHO! I love you. Xoxo"

Meanwhile, Justin just posted a smiley face on his Twitter account.