On January 29th, Sia will release her seventh studio album, This Is Acting. The LP has an unusual premise in that the majority of the songs were originally intended for other artists — some of today's biggest pop stars ranging from Beyoncé to Adele, who opted not to use Sia's compositions on their own albums. Instead of shelving the unwanted tunes, Sia chose to release her own versions. "I feel like they're hits, but nobody wanted them," the songwriter told us of the tracks on the new LP. "So I thought, 'Let's see, as an experiment, if I'm right.'"
This latest batch of rejects aside, Sia has been more than successful as a pop composer, having worked with everyone from Shakira to Katy Perry to help craft huge hits or deep-cut gems. Here we look back at 15 standout moments in Sia's songwriting career.