diff --git a/osu.Game.Rulesets.Karaoke.Tests/Beatmaps/Formats/KaraokeLegacyBeatmapDecoderTest.cs b/osu.Game.Rulesets.Karaoke.Tests/Beatmaps/Formats/KaraokeLegacyBeatmapDecoderTest.cs
index 2b1d20694..c6f57a537 100644
--- a/osu.Game.Rulesets.Karaoke.Tests/Beatmaps/Formats/KaraokeLegacyBeatmapDecoderTest.cs
+++ b/osu.Game.Rulesets.Karaoke.Tests/Beatmaps/Formats/KaraokeLegacyBeatmapDecoderTest.cs
@@ -90,7 +90,7 @@ public void TestDecodeStyle()
 
             // Check layout and font index
             Assert.AreEqual(lyric.LayoutIndex, 2);
-            Assert.AreEqual(lyric.Singers, 3);
+            Assert.AreEqual(lyric.Singers, new[] { 1, 2 });
         }
 
         [Test]
diff --git a/osu.Game.Rulesets.Karaoke.Tests/Utils/SingerUtilsTest.cs b/osu.Game.Rulesets.Karaoke.Tests/Utils/SingerUtilsTest.cs
new file mode 100644
index 000000000..257b46011
--- /dev/null
+++ b/osu.Game.Rulesets.Karaoke.Tests/Utils/SingerUtilsTest.cs
@@ -0,0 +1,31 @@
+// Copyright (c) andy840119 <andy840119@gmail.com>. Licensed under the GPL Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using NUnit.Framework;
+using osu.Game.Rulesets.Karaoke.Utils;
+
+namespace osu.Game.Rulesets.Karaoke.Tests.Utils
+{
+    [TestFixture]
+    public class SingerUtilsTest
+    {
+        [TestCase(null, 0)]
+        [TestCase(new[] { 1 }, 1)]
+        [TestCase(new[] { 1, 2, 3 }, 7)]
+        [TestCase(new[] { 1, 4, 5 }, 25)]
+        public void TestGetShiftingStyleIndex(int[] singerIndexs, int styleIndex)
+        {
+            Assert.AreEqual(SingerUtils.GetShiftingStyleIndex(singerIndexs), styleIndex);
+        }
+
+        [TestCase(-1, new int[] { })]
+        [TestCase(0, new int[] { })]
+        [TestCase(1, new[] { 1 })]
+        [TestCase(7, new[] { 1, 2, 3 })]
+        [TestCase(25, new[] { 1, 4, 5 })]
+        public void TestGetSingersIndex(int styleIndex, int[] singerIndexs)
+        {
+            Assert.AreEqual(SingerUtils.GetSingersIndex(styleIndex), singerIndexs);
+        }
+    }
+}
diff --git a/osu.Game.Rulesets.Karaoke/Edit/Singers/Components/Timeline/LyricTimelineHitObjectBlueprint.cs b/osu.Game.Rulesets.Karaoke/Edit/Singers/Components/Timeline/LyricTimelineHitObjectBlueprint.cs
index 62a0b10d5..f9bbc5c37 100644
--- a/osu.Game.Rulesets.Karaoke/Edit/Singers/Components/Timeline/LyricTimelineHitObjectBlueprint.cs
+++ b/osu.Game.Rulesets.Karaoke/Edit/Singers/Components/Timeline/LyricTimelineHitObjectBlueprint.cs
@@ -57,8 +57,8 @@ public LyricTimelineHitObjectBlueprint(HitObject hitObject, Singer singer)
             {
                 lyric.SingersBindable.BindValueChanged(e =>
                 {
-                    // Check is lyric contains this singer.
-                    var isSingerMatch = e.NewValue.Contains(singer.ID);
+                    // Check is lyric contains this singer, or default singer
+                    var isSingerMatch = e.NewValue?.Contains(singer.ID) ?? singer.ID == 0;
                     if (isSingerMatch)
                     {
                         Show();
diff --git a/osu.Game.Rulesets.Karaoke/Skinning/KaraokeSkinLookup.cs b/osu.Game.Rulesets.Karaoke/Skinning/KaraokeSkinLookup.cs
index 8e07e6371..c19ae5d05 100644
--- a/osu.Game.Rulesets.Karaoke/Skinning/KaraokeSkinLookup.cs
+++ b/osu.Game.Rulesets.Karaoke/Skinning/KaraokeSkinLookup.cs
@@ -16,7 +16,7 @@ public readonly struct KaraokeSkinLookup
         public KaraokeSkinLookup(KaraokeSkinConfiguration config, int[] singers)
             : this(config, SingerUtils.GetShiftingStyleIndex(singers))
         {
-            if (config != KaraokeSkinConfiguration.LyricStyle || config != KaraokeSkinConfiguration.NoteStyle)
+            if (config != KaraokeSkinConfiguration.LyricStyle && config != KaraokeSkinConfiguration.NoteStyle)
                 throw new InvalidDataException($"Only {KaraokeSkinConfiguration.LyricStyle} and {KaraokeSkinConfiguration.NoteStyle} can call this ctor.");
         }
 
diff --git a/osu.Game.Rulesets.Karaoke/Utils/SingerUtils.cs b/osu.Game.Rulesets.Karaoke/Utils/SingerUtils.cs
index 9a18eb668..cf13d64ff 100644
--- a/osu.Game.Rulesets.Karaoke/Utils/SingerUtils.cs
+++ b/osu.Game.Rulesets.Karaoke/Utils/SingerUtils.cs
@@ -9,9 +9,17 @@ namespace osu.Game.Rulesets.Karaoke.Utils
     public static class SingerUtils
     {
         public static int GetShiftingStyleIndex(int[] singerIds)
-            => singerIds.Sum(x => (int)Math.Pow(2, x - 1));
+            => singerIds?.Sum(x => (int)Math.Pow(2, x - 1)) ?? 0;
 
         public static int[] GetSingersIndex(int styleIndex)
-            => throw new NotImplementedException();
+        {
+            if (styleIndex < 1)
+                return Array.Empty<int>();
+
+            string binary = Convert.ToString(styleIndex, 2);
+
+            return binary.Select((v, i) => new { value = v, singer = binary.Length - i })
+                .Where(x => x.value == '1').Select(x => x.singer).OrderBy(x => x).ToArray();
+        }
     }
 }