Chris Kirkpatrick says his *NSYNC bandmate Justin Timberlake “showed me a whole new level of strength” in the wake of Timberlake’s announcement that he has Lyme disease on Thursday (July 31).

Kirkpatrick took to Instagram to show support for Timberlake, who struggled with Lyme disease on his recent Forget Tomorrow World Tour, which closed out last night.

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“Watching him battle Lyme disease day in and day out, while still getting on that stage night after night, was something I’ll never forget,” Kirkpatrick wrote under a photo of himself, Timberlake and fellow *NSYNC