UPDATE: The Recording Academy has confirmed that Katy Perry will also perform, and that Robin Thicke will perform with Chicago, as well as Metallica with Chinese pianist Lang Lang.

Lorde and Robin Thicke, two of 2013's biggest acts, will perform at this year's GRAMMYs ceremony, the Recording Academy confirmed on Monday night.

The "Royals" singer and "Blurred Lines" crooner join previously confirmed acts Kendrick Lamar with Imagine Dragons; Daft Punk with Pharrell Williams, Nile Rodgers and Stevie Wonder; P!nk with Nate Ruess; and Blake Shelton with Merle Haggard, Kris Kristofferson and Willie Nelson.

Now less than three weeks out, additional performers and presenters are expected to be announced over the next few days. The GRAMMYs will air live Jan. 26 at 8/7c on CBS.