Per https://community.pandora.com/t5/My-Collection/How-to-manually-add-songs-to-My-Thumbs-Up-playlist/m-p/35758#M7148, you can add individual songs to your My Thumbs Up Playlist: To add new tracks to your My Thumbs Up playlist on a mobile device: First, use the search bar to find your favorite songs or albums you want to add. Tap on the song or album you want to add. Tap the ellipsis (...) below the album art, and then tap Add to Playlist. Then scroll down to find your My Thumbs Up playlist. To add new tracks to your My Thumbs Up playlist on a web: First, use the search bar to find your favorite songs or albums you want to add. Click on the song or album you want to add. Click the ellipsis (...) below the album art, and hover over Add to Playlist. Then scroll down to find your My Thumbs Up playlist. ... View more