Selena Gomez's break from work is already doing her good. The 21-year-old singer posted a new photo of herself on Instagram on Sunday, Dec. 22, and shared an update on her life after announcing last week that she was canceling her Australian tour to focus on herself. Justin serenaded his friend and fellow performer Gomez to his hit “One Less Lonely Girl” during Dick Clark’s New Year’s Rockin’ Eve at Aria Resort & Casino in Las Vegas. "I'm the happiest I've been in a while," Gomez captioned the Instagram snapshot. "So blessed and thankful for the future, for release and to...…Selena Gomez's break from work is already doing her good. The 21-year-old singer posted a new photo of herself on Instagram on Sunday, Dec. 22, and shared an update on her life after announcing last week that she was canceling her Australian tour to focus on herself. Justin serenaded his friend and fellow performer Gomez to his hit “One Less Lonely Girl” during Dick Clark’s New Year’s Rockin’ Eve at Aria Resort & Casino in Las Vegas. "I'm the happiest I've been in a while," Gomez captioned the Instagram snapshot. "So blessed and thankful for the future, for release and to...WW…